Munchausen numbers: Difference between revisions
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{{
A [[wp:Munchausen number|Munchausen number]] is a natural number ''n'' the sum of whose digits (in base 10), each raised to the power of itself, equals ''n''.
('''Munchausen''' is also spelled: '''Münchhausen'''.)
For instance: <big> 3435 = 3<sup>3</sup> + 4<sup>4</sup> + 3<sup>3</sup> + 5<sup>5</sup> </big>
;Task
Find all Munchausen numbers between '''1''' and '''5000'''.
;Also see:
:* The OEIS entry: [[oeis:A046253| A046253]]
:* The Wikipedia entry: [[wp:Perfect_digit-to-digit_invariant| Perfect digit-to-digit invariant, redirected from ''Munchausen Number'']]
<br><br>
=={{header|11l}}==
{{trans|Python}}
<syntaxhighlight lang="11l">L(i) 5000
I i == sum(String(i).map(x -> Int(x) ^ Int(x)))
print(i)</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|360 Assembly}}==
<syntaxhighlight lang="360asm">* Munchausen numbers 16/03/2019
MUNCHAU CSECT
USING MUNCHAU,R12 base register
LR R12,R15 set addressability
L R3,=F'5000' for do i=1 to 5000
LA R6,1 i=1
LOOPI SR R10,R10 s=0
LR R0,R6 ii=i
LA R11,4 for do j=1 to 4
LA R7,P10 j=1
LOOPJ L R8,0(R7) d=p10(j)
LR R4,R0 ii
SRDA R4,32 ~
DR R4,R8 (n,r)=ii/d
SLA R5,2 ~
L R1,POW(R5) pow(n+1)
AR R10,R1 s=s+pow(n+1)
LR R0,R4 ii=r
LA R7,4(R7) j++
BCT R11,LOOPJ enddo j
CR R10,R6 if s=i
BNE SKIP then
XDECO R6,PG edit i
XPRNT PG,L'PG print i
SKIP LA R6,1(R6) i++
BCT R3,LOOPI enddo i
BR R14 return to caller
POW DC F'0',F'1',F'4',F'27',F'256',F'3125',4F'0'
P10 DC F'1000',F'100',F'10',F'1'
PG DC CL12' ' buffer
REGEQU
END MUNCHAU </syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|8080 Assembly}}==
<syntaxhighlight lang="8080asm">putch: equ 2 ; CP/M syscall to print character
puts: equ 9 ; CP/M syscall to print string
org 100h
lxi b,0500h ; B C D E hold 4 digits of number
lxi d,0000h ; we work backwards from 5000
lxi h,-5000 ; HL holds negative binary representation of number
test: push h ; Keep current number
push d ; Keep last two digits (to use DE as scratch register)
push h ; Keep current number (to test against)
lxi h,0 ; Digit power sum = 0
mov a,b
call addap
mov a,c
call addap
mov a,d
call addap
mov a,e
call addap
xra a ; Correct for leading zeroes
ora b
jnz calc
dcx h
ora c
jnz calc
dcx h
ora d
jnz calc
dcx h
calc: pop d ; Load current number (as negative) into DE
dad d ; Add to sum of digits (if equal, should be 0)
mov a,h ; See if they are equal
ora l
pop d ; Restore last two digits
pop h ; Restore current number
jnz next ; If not equal, this is not a Munchhausen number
mov a,b ; Otherwise, print the number
call pdgt
mov a,c
call pdgt
mov a,d
call pdgt
mov a,e
call pdgt
call pnl
next: inx h ; Increment negative binary representation
mvi a,5
dcr e ; Decrement last digit
jp test ; If not negative, try next number
mov e,a ; Otherwise, set to 5,
inx h ; Add 4 extra to HL,
inx h
inx h
inx h
dcr d
jp test
mov d,a
push d ; Add 40 extra to HL,
lxi d,40
dad d
pop d
dcr c
jp test
mov c,a
push d ; Add 400 extra to HL,
lxi d,400
dad d
pop d
dcr b
jp test
ret ; When B<0, we're done
;;; Print A as digit
pdgt: adi '0'
push b ; Save all registers (CP/M tramples them)
push d
push h
mov e,a ; Print character
mvi c,putch
call 5
restor: pop h ; Restore registers
pop d
pop b
ret
;;; Print newline
pnl: push b ; Save all registers
push d
push h
lxi d,nl ; Print newline
mvi c,puts
call 5
jmp restor ; Restore registers
nl: db 13,10,'$'
;;; Add A^A to HL
addap: push d ; Keep DE
push h ; Keep HL
add a ; A *= 2 (entries are 2 bytes wide)
mvi d,0 ; DE = lookup table index
mov e,a
lxi h,dpow ; Calculate table address
dad d
mov e,m ; Load low byte into E
inx h
mov d,m ; Load high byte into D
pop h ; Retrieve old HL
dad d ; Add power
pop d ; Restore DE
ret
dpow: dw 1,1,4,27,256,3125 ; 0^0 to 5^5 lookup table</syntaxhighlight>
{{out}}
<pre>3435
0001</pre>
=={{header|ABC}}==
<syntaxhighlight lang="ABC">HOW TO REPORT munchausen n:
PUT 0 IN sum
PUT n IN m
WHILE m > 0:
PUT m mod 10 IN digit
PUT sum + digit**digit IN sum
PUT floor(m/10) IN m
REPORT sum = n
FOR n IN {1..5000}:
IF munchausen n: WRITE n/</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Action!}}==
<syntaxhighlight lang="action!">;there are considered digits 0-5 because 6^6>5000
DEFINE MAXDIGIT="5"
INT ARRAY powers(MAXDIGIT+1)
INT FUNC Power(BYTE x)
INT res
BYTE i
IF x=0 THEN RETURN (0) FI
res=1
FOR i=0 TO x-1
DO
res==*x
OD
RETURN (res)
BYTE FUNC IsMunchausen(INT x)
INT sum,tmp
BYTE d
tmp=x sum=0
WHILE tmp#0
DO
d=tmp MOD 10
IF d>MAXDIGIT THEN
RETURN (0)
FI
sum==+powers(d)
tmp==/10
OD
IF sum=x THEN
RETURN (1)
FI
RETURN (0)
PROC Main()
INT i
FOR i=0 TO MAXDIGIT
DO
powers(i)=Power(i)
OD
FOR i=1 TO 5000
DO
IF IsMunchausen(i) THEN
PrintIE(i)
FI
OD
RETURN</syntaxhighlight>
{{out}}
[https://gitlab.com/amarok8bit/action-rosetta-code/-/raw/master/images/Munchausen_numbers.png Screenshot from Atari 8-bit computer]
<pre>
1
3435
</pre>
=={{header|Ada}}==
<syntaxhighlight lang="ada">with Ada.Text_IO;
procedure Munchausen is
function Is_Munchausen (M : in Natural) return Boolean is
Table : constant array (Character range '0' .. '9') of Natural :=
(0**0, 1**1, 2**2, 3**3, 4**4,
5**5, 6**6, 7**7, 8**8, 9**9);
Image : constant String := M'Image;
Sum : Natural := 0;
begin
for I in Image'First + 1 .. Image'Last loop
Sum := Sum + Table (Image (I));
end loop;
return Image = Sum'Image;
end Is_Munchausen;
begin
for M in 1 .. 5_000 loop
if Is_Munchausen (M) then
Ada.Text_IO.Put (M'Image);
end if;
end loop;
Ada.Text_IO.New_Line;
end Munchausen;</syntaxhighlight>
{{out}}
<pre> 1 3435</pre>
=={{header|ALGOL 68}}==
<syntaxhighlight lang="algol68"># Find Munchausen Numbers between 1 and 5000 #
# note that 6^6 is 46 656 so we only need to consider numbers consisting of 0 to 5 #
# table of Nth powers - note 0^0 is 0 for Munchausen numbers, not 1 #
[]INT nth power = ([]INT( 0, 1, 2 * 2, 3 * 3 * 3, 4 * 4 * 4 * 4, 5 * 5 * 5 * 5 * 5 ))[ AT 0 ];
INT d1 := 0; INT d1 part := 0;
INT d2 := 0; INT d2 part := 0;
INT d3 := 0; INT d3 part := 0;
INT d4 := 1;
WHILE d1 < 6 DO
INT number = d1 part + d2 part + d3 part + d4;
INT digit power sum := nth power[ d1 ]
+ nth power[ d2 ]
+ nth power[ d3 ]
+ nth power[ d4 ];
IF digit power sum = number THEN
print( ( whole( number, 0 ), newline ) )
FI;
d4 +:= 1;
IF d4 > 5 THEN
d4 := 0;
d3 +:= 1;
d3 part +:= 10;
IF d3 > 5 THEN
d3 := 0;
d3 part := 0;
d2 +:= 1;
d2 part +:= 100;
IF d2 > 5 THEN
d2 := 0;
d2 part := 0;
d1 +:= 1;
d1 part +:= 1000;
FI
FI
FI
OD
</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
Alternative that finds all 4 Munchausen numbers. As noted by the Pascal sample, we only need to consider one arrangement of the digits of each number (e.g. we only need to consider 3345, not 3435, 3453, etc.). This also relies on the non-standard 0^0 = 0.
<syntaxhighlight lang="algol68"># Find all Munchausen numbers - note 11*(9^9) has only 10 digits so there are no #
# Munchausen numbers with 11+ digits #
# table of Nth powers - note 0^0 is 0 for Munchausen numbers, not 1 #
[]INT nth power = ([]INT( 0, 1, 2 ^ 2, 3 ^ 3, 4 ^ 4, 5 ^ 5, 6 ^ 6, 7 ^ 7, 8 ^ 8, 9 ^ 9 ) )[ AT 0 ];
[ ]INT z count = []INT( ( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ) )[ AT 0 ];
[ 0 : 9 ]INT d count := z count;
# as the digit power sum is independent of the order of the digits, we need only #
# consider one arrangement of each possible combination of digits #
FOR d2 FROM 0 TO
FOR
FOR
FOR d8 FROM 0 TO d7
FOR d9 FROM 0 TO
FOR
digit power sum +:= nth power[ d9 ] + nth power[ da ];
# count the occurrences of each digit (including leading zeros #
d count := z count;
d count[ d1 ] +:= 1; d count[ d2 ] +:= 1; d count[ d3 ] +:= 1;
d count[ d4 ] +:= 1; d count[ d5 ] +:= 1; d count[ d6 ] +:= 1;
d count[ d7 ] +:= 1; d count[ d8 ] +:= 1; d count[ d9 ] +:= 1;
d count[ da ] +:= 1;
# subtract the occurrences of each digit in the power sum #
# (also including leading zeros) - if all counts drop to 0 we #
# have a Munchausen number #
LONG INT number := digit power sum;
INT leading zeros := 10;
WHILE number > 0 DO
d count[ SHORTEN ( number MOD 10 ) ] -:= 1;
leading zeros -:= 1;
number OVERAB 10
OD;
d count[ 0 ] -:= leading zeros;
IF d count[ 0 ] = 0 AND d count[ 1 ] = 0 AND d count[ 2 ] = 0
AND d count[ 3 ] = 0 AND d count[ 4 ] = 0 AND d count[ 5 ] = 0
AND d count[ 6 ] = 0 AND d count[ 7 ] = 0 AND d count[ 8 ] = 0
AND d count[ 9 ] = 0
THEN
print( ( digit power sum, newline ) )
FI
OD
OD
OD
OD
OD
OD
OD
OD
OD
OD</
{{out}}
<pre>
+0
+1
+3435
+438579088
</pre>
=={{header|ALGOL W}}==
{{Trans|ALGOL 68}}
<syntaxhighlight lang="algolw">% Find Munchausen Numbers between 1 and 5000 %
% note that 6^6 is 46 656 so we only need to consider numbers consisting of 0 to 5 %
begin
% table of nth Powers - note 0^0 is 0 for Munchausen numbers, not 1 %
integer array nthPower( 0 :: 5 );
integer d1, d2, d3, d4, d1Part, d2Part, d3Part;
nthPower( 0 ) := 0; nthPower( 1 ) := 1;
nthPower( 2 ) := 2 * 2; nthPower( 3 ) := 3 * 3 * 3;
nthPower( 4 ) := 4 * 4 * 4 * 4; nthPower( 5 ) := 5 * 5 * 5 * 5 * 5;
d1 := d2 := d3 := d1Part := d2Part := d3Part := 0;
d4 := 1;
while d1 < 6 do begin
integer number, digitPowerSum;
number := d1Part + d2Part + d3Part + d4;
digitPowerSum := nthPower( d1 )
+ nthPower( d2 )
+ nthPower( d3 )
+ nthPower( d4 );
if digitPowerSum = number then begin
write( i_w := 1, number )
end;
d4 := d4 + 1;
if d4 > 5 then begin
d4 := 0;
d3 := d3 + 1;
d3Part := d3Part + 10;
if d3 > 5 then begin
d3 := 0;
d3Part := 0;
d2 := d2 + 1;
d2Part := d2Part + 100;
if d2 > 5 then begin
d2 := 0;
d2Part := 0;
d1 := d1 + 1;
d1Part := d1Part + 1000;
end
end
end
end
end.</syntaxhighlight>
{{out}}
<pre>
Line 42 ⟶ 449:
3435
</pre>
=={{header|APL}}==
{{works with|Dyalog APL}}
<syntaxhighlight lang="apl">(⊢(/⍨)⊢=+/∘(*⍨∘⍎¨⍕)¨)⍳ 5000</syntaxhighlight>
{{out}}
<pre>1 3435</pre>
=={{header|AppleScript}}==
===Functional===
<syntaxhighlight lang="applescript">------------------- MUNCHAUSEN NUMBER ? --------------------
-- isMunchausen :: Int -> Bool
on isMunchausen(n)
-- digitPowerSum :: Int -> Character -> Int
script digitPowerSum
on |λ|(a, c)
set d to c as integer
a + (d ^ d)
end |λ|
end script
(class of n is integer) and ¬
n = foldl(digitPowerSum, 0, characters of (n as string))
end isMunchausen
--------------------------- TEST ---------------------------
on run
filter(isMunchausen,
--> {1, 3435}
Line 55 ⟶ 489:
end run
-------------------- GENERIC FUNCTIONS ---------------------
-- enumFromTo :: Int -> Int -> [Int]
on enumFromTo(m, n)
if m ≤ n then
set lst to {}
repeat with i from m to n
set end of lst to i
end repeat
lst
else
{}
end if
end enumFromTo
-- filter :: (a -> Bool) -> [a] -> [a]
on filter(
set lst to {}
set
repeat with i from 1 to lng
end filter
-- foldl :: (a -> b -> a) -> a -> [b] -> a
on foldl(f, startValue, xs)
set v to startValue
set
repeat with i from 1 to lng
set v to |λ|(v, item i of xs, i, xs)
end repeat
end foldl
-- Lift 2nd class handler function into 1st class script wrapper
--
on
if
else
property |λ| : f
end script
end if
end mReturn</syntaxhighlight>
{{Out}}
<syntaxhighlight lang="applescript">{1, 3435}</syntaxhighlight>
===Iterative===
More straightforwardly:
<syntaxhighlight lang="applescript">set MunchhausenNumbers to {}
repeat with i from 1 to 5000
if (i > 0) then
set n to i
set s to 0
repeat until (n is 0)
tell n mod 10 to set s to s + it ^ it
set n to n div 10
end repeat
if (s = i) then set end of MunchhausenNumbers to i
end if
end repeat
return MunchhausenNumbers</syntaxhighlight>
{{Out}}
<syntaxhighlight lang
=={{header|Arturo}}==
<syntaxhighlight lang="rebol">munchausen?: function [n][
n = sum map split to :string n 'digit [
d: to :integer digit
d^d
]
]
loop 1..5000 'x [
if munchausen? x ->
print x
]</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|AutoHotkey}}==
<syntaxhighlight lang="autohotkey">Loop, 5000
{
Loop, Parse, A_Index
var += A_LoopField**A_LoopField
if (var = A_Index)
num .= var "`n"
var := 0
}
Msgbox, %num%</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|AWK}}==
<syntaxhighlight lang="awk">
# syntax: GAWK -f MUNCHAUSEN_NUMBERS.AWK
BEGIN {
for (i=1; i<=5000; i++) {
sum = 0
for (j=1; j<=length(i); j++) {
digit = substr(i,j,1)
sum += digit ^ digit
}
if (i == sum) {
printf("%d\n",i)
}
}
exit(0)
}
</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|BASIC}}==
This should need only minimal modification to work with any old-style BASIC that supports user-defined functions. The call to <code>INT</code> in line 10 is needed because the exponentiation operator may return a (floating-point) value that is slightly too large.
<syntaxhighlight lang="basic">10 DEF FN P(X)=INT(X^X*SGN(X))
20 FOR I=0 TO 5
30 FOR J=0 TO 5
40 FOR K=0 TO 5
50 FOR L=0 TO 5
60 M=FN P(I)+FN P(J)+FN P(K)+FN P(L)
70 N=1000*I+100*J+10*K+L
80 IF M=N AND M>0 THEN PRINT M
90 NEXT L
100 NEXT K
110 NEXT J
120 NEXT I</syntaxhighlight>
{{out}}
<pre> 1
3435</pre>
==={{header|Sinclair ZX81 BASIC}}===
Works with 1k of RAM. The word <code>FAST</code> in line 10 shouldn't be taken <i>too</i> literally. We don't have <code>DEF FN</code>, so the expression for exponentiation-where-zero-to-the-power-zero-equals-zero is written out inline.
<syntaxhighlight lang="basic"> 10 FAST
20 FOR I=0 TO 5
30 FOR J=0 TO 5
40 FOR K=0 TO 5
50 FOR L=0 TO 5
60 LET M=INT (I**I*SGN I+J**J*SGN J+K**K*SGN K+L**L*SGN L)
70 LET N=1000*I+100*J+10*K+L
80 IF M=N AND M>0 THEN PRINT M
90 NEXT L
100 NEXT K
110 NEXT J
120 NEXT I
130 SLOW</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|BBC BASIC}}==
<syntaxhighlight lang="bbcbasic">REM >munchausen
FOR i% = 0 TO 5
FOR j% = 0 TO 5
FOR k% = 0 TO 5
FOR l% = 0 TO 5
m% = FNexp(i%) + FNexp(j%) + FNexp(k%) + FNexp(l%)
n% = 1000 * i% + 100 * j% + 10 * k% + l%
IF m% = n% AND m% > 0 THEN PRINT m%
NEXT
NEXT
NEXT
NEXT
END
:
DEF FNexp(x%)
IF x% = 0 THEN
= 0
ELSE
= x% ^ x%</syntaxhighlight>
{{out}}
<pre> 1
3435</pre>
=={{header|BQN}}==
<syntaxhighlight lang="bqn">Dgts ← •Fmt-'0'˙
IsMnch ← ⊢=+´∘(⋆˜ Dgts)
IsMnch¨⊸/ 1+↕5000</syntaxhighlight>
{{out}}
<pre>⟨ 1 3435 ⟩</pre>
=={{header|C}}==
Adapted from Zack Denton's code posted on [https://zach.se/munchausen-numbers-and-how-to-find-them/ Munchausen Numbers and How to Find Them].
<
#include <math.h>
Line 154 ⟶ 714:
}
return 0;
}</
{{out}}
<pre>1
Line 160 ⟶ 720:
=={{header|C sharp|C#}}==
<
foreach (var i in Enumerable.Range(1,5000)
.Where(n => n == n.ToString()
.Sum(x => Math.Pow(toInt(x), toInt(x)))))
Console.WriteLine(i);</
{{out}}
<pre>1
3435</pre>
=== Faster version ===
{{Trans|Kotlin}}
<syntaxhighlight lang="csharp">using System;
namespace Munchhausen
{
class Program
{
static readonly long[] cache = new long[10];
static void Main()
{
// Allow for 0 ^ 0 to be 0
for (int i = 1; i < 10; i++)
{
cache[i] = (long)Math.Pow(i, i);
}
for (long i = 0L; i <= 500_000_000L; i++)
{
if (IsMunchhausen(i))
{
Console.WriteLine(i);
}
}
Console.ReadLine();
}
private static bool IsMunchhausen(long n)
{
long sum = 0, nn = n;
do
{
sum += cache[(int)(nn % 10)];
if (sum > n)
{
return false;
}
nn /= 10;
} while (nn > 0);
return sum == n;
}
}
}</syntaxhighlight>
<pre>0
1
3435
438579088</pre>
=== Faster version alternate ===
{{trans|Visual Basic .NET}}
Search covers all 11 digit numbers (as pointed out elsewhere, 11*(9^9) has only 10 digits, so there are no Munchausen numbers with 11+ digits), not just the first half of the 9 digit numbers. Computation time is under 1.5 seconds.
<syntaxhighlight lang="csharp">using System;
static class Program
{
public static void Main()
{
long sum, ten1 = 0, ten2 = 10; byte [] num; int [] pow = new int[10];
int i, j, n, n1, n2, n3, n4, n5, n6, n7, n8, n9, s2, s3, s4, s5, s6, s7, s8;
for (i = 1; i <= 9; i++) { pow[i] = i; for (j = 2; j <= i; j++) pow[i] *= i; }
for (n = 1; n <= 11; n++) { for (n9 = 0; n9 <= n; n9++) { for (n8 = 0; n8 <= n - n9; n8++) {
for (n7 = 0; n7 <= n - (s8 = n9 + n8); n7++) { for (n6 = 0; n6 <= n - (s7 = s8 + n7); n6++) {
for (n5 = 0; n5 <= n - (s6 = s7 + n6); n5++) { for (n4 = 0; n4 <= n - (s5 = s6 + n5); n4++) {
for (n3 = 0; n3 <= n - (s4 = s5 + n4); n3++) { for (n2 = 0; n2 <= n - (s3 = s4 + n3); n2++) {
for (n1 = 0; n1 <= n - (s2 = s3 + n2); n1++) {
sum = n1 * pow[1] + n2 * pow[2] + n3 * pow[3] + n4 * pow[4] +
n5 * pow[5] + n6 * pow[6] + n7 * pow[7] + n8 * pow[8] + n9 * pow[9];
if (sum < ten1 || sum >= ten2) continue;
num = new byte[10]; foreach (char ch in sum.ToString()) num[Convert.ToByte(ch) - 48] += 1;
if (n - (s2 + n1) == num[0] && n1 == num[1] && n2 == num[2]
&& n3 == num[3] && n4 == num[4] && n5 == num[5] && n6 == num[6]
&& n7 == num[7] && n8 == num[8] && n9 == num[9]) Console.WriteLine(sum);
} } } } } } } } }
ten1 = ten2; ten2 *= 10;
}
}
}</syntaxhighlight>
{{out}}
<pre>0
1
3435
438579088</pre>
=={{header|C++}}==
<syntaxhighlight lang="cpp">
#include <math.h>
#include <iostream>
unsigned pwr[10];
unsigned munch( unsigned i ) {
unsigned sum = 0;
while( i ) {
sum += pwr[(i % 10)];
i /= 10;
}
return sum;
}
int main( int argc, char* argv[] ) {
for( int i = 0; i < 10; i++ )
pwr[i] = (unsigned)pow( (float)i, (float)i );
std::cout << "Munchausen Numbers\n==================\n";
for( unsigned i = 1; i < 5000; i++ )
if( i == munch( i ) ) std::cout << i << "\n";
return 0;
}
</syntaxhighlight>
{{out}}
<pre>
Munchausen Numbers
==================
1
3435
</pre>
=={{header|Clojure}}==
<syntaxhighlight lang="lisp">(ns async-example.core
(:require [clojure.math.numeric-tower :as math])
(:use [criterium.core])
(:gen-class))
(defn get-digits [n]
" Convert number of a list of digits (e.g. 545 -> ((5), (4), (5)) "
(map #(Integer/valueOf (str %)) (String/valueOf n)))
(defn sum-power [digits]
" Convert digits such as abc... to a^a + b^b + c^c ..."
(let [digits-pwr (fn [n]
(apply + (map #(math/expt % %) digits)))]
(digits-pwr digits)))
(defn find-numbers [max-range]
" Filters for Munchausen numbers "
(->>
(range 1 (inc max-range))
(filter #(= (sum-power (get-digits %)) %))))
(println (find-numbers 5000))
</syntaxhighlight>
{{Output}}
<pre>
(1 3435)
</pre>
=={{header|CLU}}==
<syntaxhighlight lang="clu">digits = iter (n: int) yields (int)
while n>0 do
yield(n//10)
n := n/10
end
end digits
munchausen = proc (n: int) returns (bool)
k: int := 0
for d: int in digits(n) do
% Note: 0^0 is to be regarded as 0
if d~=0 then k := k + d ** d end
end
return(n = k)
end munchausen
start_up = proc ()
po: stream := stream$primary_output()
for i: int in int$from_to(1,5000) do
if munchausen(i) then stream$putl(po, int$unparse(i)) end
end
end start_up</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Common Lisp}}==
<syntaxhighlight lang="lisp">
;;; check4munch maximum &optional b
;;; Return a list with all Munchausen numbers less then or equal to maximum.
;;; Checks are done in base b (<=10, dpower is the limiting factor here).
(defun check4munch (maximum &optional (base 10))
(do ((n 1 (1+ n))
(result NIL (if (munchp n base) (cons n result) result)))
((> n maximum)
(nreverse result))))
;;;
;;; munchp n &optional b
;;; Return T if n is a Munchausen number in base b.
(defun munchp (n &optional (base 10))
(if (= n (apply #'+ (mapcar #'dpower (n2base n base)))) T NIL))
;;; dpower d
;;; Returns d^d. I.e. the digit to the power of itself.
;;; 0^0 is set to 0. For discussion see e.g. the wikipedia entry.
;;; This function is mainly performance optimization.
(defun dpower (d)
(aref #(0 1 4 27 256 3125 45556 823543 16777216 387420489) d))
;;; divmod a b
;;; Return (q,k) such that a = b*q + k and k>=0.
(defun divmod (a b)
(let ((foo (mod a b)))
(list (/ (- a foo) b) foo)))
;;; n2base n &optional b
;;; Return a list with the digits of n in base b representation.
(defun n2base (n &optional (base 10) (digits NIL))
(if (zerop n) digits
(let ((dm (divmod n base)))
(n2base (car dm) base (cons (cadr dm) digits)))))
</syntaxhighlight>
{{Out}}
<pre>
> (check4munch 5000)
(1 3435)
> (munchp 438579088)
T
</pre>
=={{header|COBOL}}==
<syntaxhighlight lang="cobol"> IDENTIFICATION DIVISION.
PROGRAM-ID. MUNCHAUSEN.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 VARIABLES.
03 CANDIDATE PIC 9(4).
03 DIGITS PIC 9 OCCURS 4 TIMES, REDEFINES CANDIDATE.
03 DIGIT PIC 9.
03 POWER-SUM PIC 9(5).
01 OUTPUT-LINE.
03 OUT-NUM PIC ZZZ9.
PROCEDURE DIVISION.
BEGIN.
PERFORM MUNCHAUSEN-TEST VARYING CANDIDATE FROM 1 BY 1
UNTIL CANDIDATE IS GREATER THAN 6000.
STOP RUN.
MUNCHAUSEN-TEST.
MOVE ZERO TO POWER-SUM.
MOVE 1 TO DIGIT.
INSPECT CANDIDATE TALLYING DIGIT FOR LEADING '0'.
PERFORM ADD-DIGIT-POWER VARYING DIGIT FROM DIGIT BY 1
UNTIL DIGIT IS GREATER THAN 4.
IF POWER-SUM IS EQUAL TO CANDIDATE,
MOVE CANDIDATE TO OUT-NUM,
DISPLAY OUTPUT-LINE.
ADD-DIGIT-POWER.
COMPUTE POWER-SUM =
POWER-SUM + DIGITS(DIGIT) ** DIGITS(DIGIT)</syntaxhighlight>
{{out}}
<pre> 1
3435</pre>
=={{header|Cowgol}}==
<syntaxhighlight lang="cowgol">include "cowgol.coh";
sub digitPowerSum(n: uint16): (sum: uint32) is
var powers: uint32[10] :=
{1, 1, 4, 27, 256, 3125, 46656, 823543, 16777216, 387420489};
sum := 0;
loop
sum := sum + powers[(n % 10) as uint8];
n := n / 10;
if n == 0 then break; end if;
end loop;
end sub;
var n: uint16 := 1;
while n < 5000 loop
if n as uint32 == digitPowerSum(n) then
print_i16(n);
print_nl();
end if;
n := n + 1;
end loop;</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Craft Basic}}==
<syntaxhighlight lang="basic">for i = 0 to 5
for j = 0 to 5
for k = 0 to 5
for l = 0 to 5
let m = int(i ^ i * sgn(i))
let m = m + int(j ^ j * sgn(j))
let m = m + int(k ^ k * sgn(k))
let m = m + int(l ^ l * sgn(l))
let n = 1000 * i + 100 * j + 10 * k + l
if m = n and m > 0 then
print m
endif
wait
next l
next k
next j
next i</syntaxhighlight>
{{out| Output}}<pre>1
3435</pre>
=={{header|D}}==
{{trans|C}}
<syntaxhighlight lang="d">import std.stdio;
void main() {
for (int i=1; i<5000; i++) {
// loop through each digit in i
// e.g. for 1000 we get 0, 0, 0, 1.
int sum = 0;
for (int number=i; number>0; number/=10) {
int digit = number % 10;
// find the sum of the digits
// raised to themselves
sum += digit ^^ digit;
}
if (sum == i) {
// the sum is equal to the number
// itself; thus it is a
// munchausen number
writeln(i);
}
}
}</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Dc}}==
Needs a modern Dc due to <code>~</code>.
Use <code>S1S2l2l1/L2L1%</code> instead of <code>~</code> to run it in older Dcs.
<syntaxhighlight lang="dc">[ O ~ S! d 0!=M L! d ^ + ] sM
[p] sp
[z d d lM x =p z 5001>L ] sL
lL x</syntaxhighlight>
Cosmetic: The stack is dirty after execution. The loop <code>L</code> needs a fix if that is a problem.
=={{header|Delphi}}==
See [https://rosettacode.org/wiki/Munchausen_numbers#Pascal Pascal].
=={{header|Draco}}==
<syntaxhighlight lang="draco">proc munchausen(word n) bool:
/* d^d for d>6 does not fit in a 16-bit word,
* it follows that any 16-bit integer containing
* a digit d>6 is not a Munchausen number */
[7]word dpow = (1, 1, 4, 27, 256, 3125, 46656);
word m, d, sum;
m := n;
sum := 0;
while
d := m % 10;
m>0 and d<=6
do
m := m/10;
sum := sum + dpow[d]
od;
d<=6 and sum=n
corp;
proc main() void:
word n;
for n from 1 upto 5000 do
if munchausen(n) then
writeln(n)
fi
od
corp</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|EasyLang}}==
<syntaxhighlight>
for i = 1 to 5000
sum = 0
n = i
while n > 0
dig = n mod 10
sum += pow dig dig
n = n div 10
.
if sum = i
print i
.
.
</syntaxhighlight>
=={{header|Elixir}}==
<syntaxhighlight lang="elixir">defmodule Munchausen do
@pow for i <- 0..9, into: %{}, do: {i, :math.pow(i,i) |> round}
def number?(n) do
n == Integer.digits(n) |> Enum.reduce(0, fn d,acc -> @pow[d] + acc end)
end
end
Enum.each(1..5000, fn i ->
if Munchausen.number?(i), do: IO.puts i
end)</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|F sharp|F#}}==
<syntaxhighlight lang="fsharp">let toFloat x = x |> int |> fun n -> n - 48 |> float
let power x = toFloat x ** toFloat x |> int
let isMunchausen n = n = (string n |> Seq.map char |> Seq.map power |> Seq.sum)
printfn "%A" ([1..5000] |> List.filter isMunchausen)</syntaxhighlight>
{{out}}
<pre>[1; 3435]</pre>
=={{header|Factor}}==
<syntaxhighlight lang="factor">USING: kernel math.functions math.ranges math.text.utils
prettyprint sequences ;
: munchausen? ( n -- ? )
dup 1 digit-groups dup [ ^ ] 2map sum = ;
5000 [1,b] [ munchausen? ] filter .</syntaxhighlight>
{{out}}
<pre>
V{ 1 3435 }
</pre>
=={{header|FALSE}}==
<syntaxhighlight lang="false">0[1+$5000>~][
$$0\[$][
$10/$@\10*-
$0>[
$$[1-$][\2O*\]#
%\%
]?
@+\
]#
%=[$.10,]?
]#%</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|FOCAL}}==
<syntaxhighlight lang="focal">01.10 F N=1,5000;D 2
02.10 S M=N;S S=0
02.20 S D=M-FITR(M/10)*10
02.25 S S=S+D^D
02.30 S M=FITR(M/10)
02.40 I (M),2.5,2.2
02.50 I (N-S)2.7,2.6,2.7
02.60 T %4,N,!
02.70 R</syntaxhighlight>
{{out}}
<pre>= 1
= 3435</pre>
=={{header|Forth}}==
{{works with|GNU Forth|0.7.0}}
<syntaxhighlight lang="forth">
: dig.num \ returns input number and the number of its digits ( n -- n n1 )
dup
0 swap
begin
swap 1 + swap
dup 10 >= while
10 /
repeat
drop ;
: to.self \ returns input number raised to the power of itself ( n -- n^n )
dup 1 = if drop 1 else \ positive numbers only, zero and negative returns zero
dup 0 <= if drop 0 else
dup
1 do
dup
loop
dup
1 do
*
loop
then then ;
: ten.to \ ( n -- 10^n ) returns 1 for zero and negative
dup 0 <= if drop 1 else
dup 1 = if drop 10 else
10 swap
1 do
10 *
loop then then ;
: zero.divmod \ /mod that returns zero if number is zero
dup
0 = if drop 0
else /mod
then ;
: split.div \ returns input number and its digits ( n -- n n1 n2 n3....)
dup 10 < if dup 0 else \ duplicates single digit numbers adds 0 for add.pow
dig.num \ provides number of digits
swap dup rot dup 1 - ten.to swap \ stack juggling, ten raised to number of digits - 1...
1 do \ ... is the needed divisor, counter on top and ...
dup rot swap zero.divmod swap rot 10 / \ ...division loop
loop drop then ;
: add.pow \ raises each number on the stack except last one to ...
to.self \ ...the power of itself and adds them
depth \ needs at least 3 numbers on the stack
2 do
swap to.self +
loop ;
: check.num
split.div add.pow ;
: munch.num \ ( n -- ) displays Munchausen numbers between 1 and n
1 +
page
1 do
i check.num = if i . cr
then loop ;
</syntaxhighlight>
{{out}}
<pre>
1
3435
ok
</pre>
=={{header|Fortran}}==
{{trans|360 Assembly}}
===Fortran IV===
<syntaxhighlight lang="fortran">C MUNCHAUSEN NUMBERS - FORTRAN IV
DO 2 I=1,5000
IS=0
II=I
DO 1 J=1,4
ID=10**(4-J)
N=II/ID
IR=MOD(II,ID)
IF(N.NE.0) IS=IS+N**N
1 II=IR
2 IF(IS.EQ.I) WRITE(*,*) I
END </syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
===Fortran 77===
<syntaxhighlight lang="fortran">! MUNCHAUSEN NUMBERS - FORTRAN 77
DO I=1,5000
IS=0
II=I
DO J=1,4
ID=10**(4-J)
N=II/ID
IR=MOD(II,ID)
IF(N.NE.0) IS=IS+N**N
II=IR
END DO
IF(IS.EQ.I) WRITE(*,*) I
END DO
END </syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|FreeBASIC}}==
===Version 1===
<syntaxhighlight lang="freebasic">' FB 1.05.0 Win64
' Cache n ^ n for the digits 1 to 9
' Note than 0 ^ 0 specially treated as 0 (not 1) for this purpose
Dim Shared powers(1 To 9) As UInteger
For i As UInteger = 1 To 9
Dim power As UInteger = i
For j As UInteger = 2 To i
power *= i
Next j
powers(i) = power
Next i
Function isMunchausen(n As UInteger) As Boolean
Dim p As UInteger = n
Dim As UInteger digit, sum
While p > 0
digit = p Mod 10
If digit > 0 Then sum += powers(digit)
p \= 10
Wend
Return n = sum
End Function
Print "The Munchausen numbers between 0 and 500000000 are : "
For i As UInteger = 0 To 500000000
If isMunchausen(i) Then Print i
Next
Print
Print "Press any key to quit"
Sleep</syntaxhighlight>
{{out}}
<pre>The Munchausen numbers between 0 and 500000000 are :
0
1
3435
438579088</pre>
===Version 2===
<syntaxhighlight lang="freebasic">' version 12-10-2017
' compile with: fbc -s console
Dim As UInteger i, j, n, sum, ten1, ten2 = 10
Dim As UInteger n0, n1, n2, n3, n4, n5, n6, n7, n8, n9
Dim As UInteger s1, s2, s3, s4, s5, s6, s7, s8
Dim As UInteger pow(9), num()
Dim As String number
For i = 1 To 9
pow(i) = i
For j = 2 To i
pow(i) *= i
Next
Next
For n = 1 To 11
For n9 = 0 To n
For n8 = 0 To n - n9
s8 = n9 + n8
For n7 = 0 To n - s8
s7 = s8 + n7
For n6 = 0 To n - s7
s6 = s7 + n6
For n5 = 0 To n - s6
s5 = s6 + n5
For n4 = 0 To n - s5
s4 = s5 + n4
For n3 = 0 To n - s4
s3 = s4 + n3
For n2 = 0 To n - s3
s2 = s3 + n2
For n1 = 0 To n - s2
n0 = n - (s2 + n1)
sum = n1 * pow(1) + n2 * pow(2) + n3 * pow(3) + _
n4 * pow(4) + n5 * pow(5) + n6 * pow(6) + _
n7 * pow(7) + n8 * pow(8) + n9 * pow(9)
If sum < ten1 Or sum >= ten2 Then Continue For
ReDim num(9) : number = Str(sum)
For i = 0 To n -1
j = number[i] -48
num(j) += 1
Next i
If n0 = num(0) AndAlso n1 = num(1) AndAlso n2 = num(2) AndAlso _
n3 = num(3) AndAlso n4 = num(4) AndAlso n5 = num(5) AndAlso _
n6 = num(6) AndAlso n7 = num(7) AndAlso n8 = num(8) AndAlso _
n9 = num(9) Then Print sum
Next n1
Next n2
Next n3
Next n4
Next n5
Next n6
Next n7
Next n8
Next n9
ten1 = ten2
ten2 *= 10
Next n
' empty keyboard buffer
While Inkey <> "" : Wend
Print : Print "hit any key to end program"
Sleep
End</syntaxhighlight>
{{out}}
<pre>0
1
3435
438579088</pre>
=={{header|Frink}}==
<syntaxhighlight lang="frink">isMunchausen = { |x|
sum = 0
for d = integerDigits[x]
sum = sum + d^d
return sum == x
}
println[select[1 to 5000, isMunchausen]]</syntaxhighlight>
{{out}}
<pre>
[1, 3435]
</pre>
=={{header|Fōrmulæ}}==
{{FormulaeEntry|page=https://formulae.org/?script=examples/Munchausen_numbers}}
'''Solution'''
[[File:Fōrmulæ - Munchausen numbers 01.png]]
'''Test case 1''' Find all Munchausen numbers between 1 and 5000
[[File:Fōrmulæ - Munchausen numbers 02.png]]
[[File:Fōrmulæ - Munchausen numbers 03.png]]
'''Test case 2''' Show the Munchausen numbers between 1 and 5,000 from bases 2 to 10
[[File:Fōrmulæ - Munchausen numbers 04.png]]
[[File:Fōrmulæ - Munchausen numbers 05.png]]
=={{header|Go}}==
{{trans|Kotlin}}
<syntaxhighlight lang="go">package main
import(
"fmt"
"math"
)
var powers [10]int
func isMunchausen(n int) bool {
if n < 0 { return false }
n64 := int64(n)
nn := n64
var sum int64 = 0
for nn > 0 {
sum += int64(powers[nn % 10])
if sum > n64 { return false }
nn /= 10
}
return sum == n64
}
func main() {
// cache n ^ n for n in 0..9, defining 0 ^ 0 = 0 for this purpose
for i := 1; i <= 9; i++ {
d := float64(i)
powers[i] = int(math.Pow(d, d))
}
// check numbers 0 to 500 million
fmt.Println("The Munchausen numbers between 0 and 500 million are:")
for i := 0; i <= 500000000; i++ {
if isMunchausen(i) { fmt.Printf("%d ", i) }
}
fmt.Println()
}</syntaxhighlight>
{{out}}
<pre>
0 1 3435 438579088
</pre>
=={{header|Haskell}}==
<
import Data.List (unfoldr)
isMunchausen :: Integer -> Bool
isMunchausen =
(==)
digit 0 = Nothing
digit n = Just (r, q) where (q, r) = n `divMod` 10
main :: IO ()
main = print $ filter isMunchausen [1 .. 5000]</
{{out}}
<pre>[1,3435]</pre>
The Haskell libraries provide a lot of flexibility – we could also reduce the sum and map (above) down to a single foldr:
<syntaxhighlight lang="haskell">import Data.Char (digitToInt)
isMunchausen :: Int -> Bool
isMunchausen =
(==)
<*> foldr ((+) . (id >>=) (^) . digitToInt) 0 . show
main :: IO ()
main = print $ filter isMunchausen [1 .. 5000]</syntaxhighlight>
Or, without digitToInt, but importing join, swap and bool.
<syntaxhighlight lang="haskell">import Control.Monad (join)
import Data.Bool (bool)
import Data.List (unfoldr)
import Data.Tuple (swap)
isMunchausen :: Integer -> Bool
isMunchausen =
(==)
<*> ( foldr ((+) . join (^)) 0
. unfoldr
( ( flip bool Nothing
. Just
. swap
. flip quotRem 10
)
<*> (0 ==)
)
)
main :: IO ()
main = print $ filter isMunchausen [1 .. 5000]</syntaxhighlight>
{{Out}}
<pre>[1,3435]</pre>
=={{header|J}}==
Here, it would be useful to have a function which sums the powers of the digits of a number. Once we have that we can use it with an equality test to filter those integers:
<
(#~ ] = munch"0) 1+i.5000
1 3435</
Note that [[wp:Munchausen_number|wikipedia]] claims that 0=0^0 in the context of Munchausen numbers. It's not clear why this should be (1 is the multiplicative identity and if you do not multiply it by zero it should still be 1), but it's easy enough to implement. Note also that this does not change the result for this task:
<
(#~ ] = munch"0) 1+i.5000
1 3435</
=={{header|Java}}==
Adapted from Zack Denton's code posted on [https://zach.se/munchausen-numbers-and-how-to-find-them/ Munchausen Numbers and How to Find Them].
<syntaxhighlight lang="java">
public class Main {
public static void main(String[] args) {
Line 211 ⟶ 1,599:
}
</syntaxhighlight>
{{out}}
<pre>1 (munchausen)
3435 (munchausen)</pre>
=== Faster version ===
{{trans|Kotlin}}
<syntaxhighlight lang="java">public class Munchhausen {
static final long[] cache = new long[10];
public static void main(String[] args) {
// Allowing 0 ^ 0 to be 0
for (int i = 1; i < 10; i++) {
cache[i] = (long) Math.pow(i, i);
}
for (long i = 0L; i <= 500_000_000L; i++) {
if (isMunchhausen(i)) {
System.out.println(i);
}
}
}
private static boolean isMunchhausen(long n) {
long sum = 0, nn = n;
do {
sum += cache[(int)(nn % 10)];
if (sum > n) {
return false;
}
nn /= 10;
} while (nn > 0);
return sum == n;
}
}</syntaxhighlight>
<pre>0
1
3435
438579088</pre>
=={{header|JavaScript}}==
===ES6===
<
.filter(n => n == n.toString().split('')
.reduce((a, b) => a+Math.pow(parseInt(b),parseInt(b)), 0)))
{{out}}
<pre>1
Line 231 ⟶ 1,654:
Or, composing reusable primitives:
<syntaxhighlight lang="javascript">(() => {
'use strict';
const main = () =>
filter(isMunchausen, enumFromTo(1, 5000));
// isMunchausen :: Int -> Bool
d => a +
)(parseInt(c, 10)),
// GENERIC ---------------------------
// enumFromTo :: Int -> Int -> [Int]
const enumFromTo = (m, n) =>
}, (_, i) => m + i);
// filter :: (a -> Bool) -> [a] -> [a]
const filter = (f, xs) => xs.filter(f);
// MAIN ---
return main();
})();</syntaxhighlight>
{{Out}}
<syntaxhighlight lang="javascript">[1, 3435]</syntaxhighlight>
=={{header|jq}}==
{{works with|jq|1.5}}
<syntaxhighlight lang="jq">def sigma( stream ): reduce stream as $x (0; . + $x ) ;
def ismunchausen:
def digits: tostring | split("")[] | tonumber;
. == sigma(digits | pow(.;.));
# Munchausen numbers from 1 to 5000 inclusive:
range(1;5001) | select(ismunchausen)</syntaxhighlight>
{{out}}
<syntaxhighlight lang="jq">1
3435</syntaxhighlight>
=={{header|Julia}}==
{{works with|Julia|1.0}}
<syntaxhighlight lang="julia">println([n for n = 1:5000 if sum(d^d for d in digits(n)) == n])</syntaxhighlight>
{{out}}
<pre>[1, 3435]</pre>
=={{header|Kotlin}}==
As it doesn't take long to find all 4 known Munchausen numbers, we will test numbers up to 500 million here rather than just 5000:
<syntaxhighlight lang="scala">// version 1.0.6
val powers = IntArray(10)
fun isMunchausen(n: Int): Boolean {
if (n < 0) return false
var sum = 0L
var nn = n
while (nn > 0) {
sum += powers[nn % 10]
if (sum > n.toLong()) return false
nn /= 10
}
return sum == n.toLong()
}
fun main(args: Array<String>) {
// cache n ^ n for n in 0..9, defining 0 ^ 0 = 0 for this purpose
for (i in 1..9) powers[i] = Math.pow(i.toDouble(), i.toDouble()).toInt()
// check numbers 0 to 500 million
println("The Munchausen numbers between 0 and 500 million are:")
for (i in 0..500000000) if (isMunchausen(i))print ("$i ")
println()
}</syntaxhighlight>
{{out}}
<pre>
The Munchausen numbers between 0 and 500 million are:
0 1 3435 438579088
</pre>
=={{header|Lambdatalk}}==
<syntaxhighlight lang="scheme">
{def munch
{lambda {:w}
{= :w {+ {S.map {{lambda {:w :i}
{pow {W.get :i :w} {W.get :i :w}}} :w}
{S.serie 0 {- {W.length :w} 1}}}}} }}
-> munch
{S.map {lambda {:i} {if {munch :i} then :i else}}
{S.serie 1 5000}}
->
1
3435
</syntaxhighlight>
=={{header|langur}}==
{{trans|C#}}
<syntaxhighlight lang="langur"># sum power of digits
val .spod = fn .n: fold fn{+}, map(fn .x: .x^.x, s2n string .n)
# Munchausen
writeln "Answers: ", filter fn .n: .n == .spod(.n), series 0..5000
</syntaxhighlight>
{{out}}
<pre>Answers: [1, 3435]</pre>
=={{header|LDPL}}==
<syntaxhighlight lang="ldpl">data:
d is number
i is number
n is number
sum is number
procedure:
for i from 1 to 5001 step 1 do
store 0 in sum
store i in n
while n is greater than 0 do
modulo n by 10 in d
raise d to d in d
add sum and d in sum
divide n by 10 in n
floor n
repeat
if sum is equal to i then
display i lf
end if
repeat
</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|Lua}}==
<
local sum, nStr, digit = 0, tostring(n)
for pos = 1, #nStr do
digit = tonumber(nStr:sub(pos, pos))
sum = sum + digit ^ digit
end
return sum == n
end
-- alternative, faster version based on the C version,
-- avoiding string manipulation, for Lua 5.3 or higher
local function isMunchausen (n)
local sum, digit, acc = 0, 0, n
while acc > 0 do
digit = acc % 10.0
sum = sum + digit ^ digit
acc = acc // 10 -- integer div
end
return sum == n
Line 278 ⟶ 1,825:
for i = 1, 5000 do
if isMunchausen(i) then print(i) end
end</
{{out}}
<pre>1
3435</pre>
=={{header|M2000 Interpreter}}==
<syntaxhighlight lang="m2000 interpreter">
Module Munchausen {
Inventory p=0:=0,1:=1
for i=2 to 9 {Append p, i:=i**i}
Munchausen=lambda p (x)-> {
m=0
t=x
do {
m+=p(x mod 10)
x=x div 10
} until x=0
=m=t
}
For i=1 to 5000
If Munchausen(i) then print i,
Next i
Print
}
Munchausen
</syntaxhighlight>
Using Array instead of Inventory
<syntaxhighlight lang="m2000 interpreter">
Module Münchhausen {
Dim p(0 to 9)
p(0)=0, 1
for i=2 to 9 {p(i)=i**i}
Münchhausen=lambda p() (x)-> {
m=0
t=x
do {
m+=p(x mod 10)
x=x div 10
} until x=0
=m=t
}
For i=1 to 5000
If Münchhausen(i) then print i,
Next i
Print
}
Münchhausen
</syntaxhighlight>
{{out}}
<pre>
1 3435
</pre>
=={{header|MAD}}==
<syntaxhighlight lang="mad"> NORMAL MODE IS INTEGER
DIMENSION P(5)
THROUGH CLCPOW, FOR D=0, 1, D.G.5
P(D) = D
THROUGH CLCPOW, FOR X=1, 1, X.GE.D
CLCPOW P(D) = P(D) * D
THROUGH TEST, FOR D1=0, 1, D1.G.5
THROUGH TEST, FOR D2=0, 1, D2.G.5
THROUGH TEST, FOR D3=0, 1, D3.G.5
THROUGH TEST, FOR D4=1, 1, D4.G.5
N = D1*1000 + D2*100 + D3*10 + D4
WHENEVER P(D1)+P(D2)+P(D3)+P(D4) .E. N
PRINT FORMAT FMT,N
TEST END OF CONDITIONAL
VECTOR VALUES FMT = $I4*$
END OF PROGRAM </syntaxhighlight>
{{out}}
<pre> 1
3435</pre>
=={{header|Maple}}==
<syntaxhighlight lang="maple">isMunchausen := proc(n::posint)
local num_digits;
num_digits := map(x -> StringTools:-Ord(x) - 48, StringTools:-Explode(convert(n, string)));
return evalb(n = convert(map(x -> x^x, num_digits), `+`));
end proc;
Munchausen_upto := proc(n::posint) local k, count, list_num;
list_num := [];
for k to n do
if isMunchausen(k) then
list_num := [op(list_num), k];
end if;
end do;
return list_num;
end proc;
Munchausen_upto(5000);</syntaxhighlight>
{{out}}
<pre>[1, 3435]</pre>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<syntaxhighlight lang="mathematica">Off[Power::indet];(*Supress 0^0 warnings*)
Select[Range[5000], Total[IntegerDigits[#]^IntegerDigits[#]] == # &]</syntaxhighlight>
{{out}}
<pre>{1,3435}</pre>
=={{header|min}}==
{{works with|min|0.19.3}}
<syntaxhighlight lang="min">(dup string "" split (int dup pow) (+) map-reduce ==) :munchausen?
1 :i
(i 5000 <=) ((i munchausen?) (i puts!) when i succ @i) while</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|Modula-2}}==
<syntaxhighlight lang="modula2">MODULE MunchausenNumbers;
FROM FormatString IMPORT FormatString;
FROM Terminal IMPORT WriteString,ReadChar;
(* Simple power function, does not handle negatives *)
PROCEDURE Pow(b,e : INTEGER) : INTEGER;
VAR result : INTEGER;
BEGIN
IF e=0 THEN
RETURN 1;
END;
IF b=0 THEN
RETURN 0;
END;
result := b;
DEC(e);
WHILE e>0 DO
result := result * b;
DEC(e);
END;
RETURN result;
END Pow;
VAR
buf : ARRAY[0..31] OF CHAR;
i,sum,number,digit : INTEGER;
BEGIN
FOR i:=1 TO 5000 DO
(* Loop through each digit in i
e.g. for 1000 we get 0, 0, 0, 1. *)
sum := 0;
number := i;
WHILE number>0 DO
digit := number MOD 10;
sum := sum + Pow(digit, digit);
number := number DIV 10;
END;
IF sum=i THEN
FormatString("%i\n", buf, i);
WriteString(buf);
END;
END;
ReadChar;
END MunchausenNumbers.</syntaxhighlight>
=={{header|Nim}}==
<syntaxhighlight lang="nim">import math
for i in 1..<5000:
var sum: int64 = 0
var number = i
while number > 0:
var digit = number mod 10
sum += digit ^ digit
number = number div 10
if sum == i:
echo i</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|OCaml}}==
<syntaxhighlight lang="ocaml">let is_munchausen n =
let pwr = [|1; 1; 4; 27; 256; 3125; 46656; 823543; 16777216; 387420489|] in
let rec aux x = if x < 10 then pwr.(x) else aux (x / 10) + pwr.(x mod 10) in
n = aux n
let () =
Seq.(ints 1 |> take 5000 |> filter is_munchausen |> iter (Printf.printf " %u"))
|> print_newline</syntaxhighlight>
{{out}}
<pre> 1 3435</pre>
=={{header|Pascal}}==
{{works with|Free Pascal}}
{{works with|Delphi}}
tried to speed things up.Only checking one arrangement of 123456789 instead of all 9! = 362880 permutations.This ist possible, because summing up is commutative.
So I only have to create [http://rosettacode.org/wiki/Combinations_with_repetitions Combinations_with_repetitions] and need to check, that the number and the sum of power of digits have the same amount in every possible digit. This means, that a combination of the digits of number leads to the sum of power of digits. Therefore I need leading zero's.
<syntaxhighlight lang="pascal">{$IFDEF FPC}{$MODE objFPC}{$ELSE}{$APPTYPE CONSOLE}{$ENDIF}
uses
sysutils;
type
tdigit = byte;
const
base = 10;
maxDigits = base-1;// set for 32-compilation otherwise overflow.
var
DgtPotDgt : array[0..base-1] of NativeUint;
cnt: NativeUint;
function CheckSameDigits(n1,n2:NativeUInt):boolean;
var
dgtCnt : array[0..Base-1] of NativeInt;
i : NativeUInt;
Begin
fillchar(dgtCnt,SizeOf(dgtCnt),#0);
repeat
//increment digit of n1
i := n1;n1 := n1 div base;i := i-n1*base;inc(dgtCnt[i]);
//decrement digit of n2
i := n2;n2 := n2 div base;i := i-n2*base;dec(dgtCnt[i]);
until (n1=0) AND (n2= 0 );
result := true;
For i := 0 to Base-1 do
result := result AND (dgtCnt[i]=0);
end;
procedure Munch(number,DgtPowSum,minDigit:NativeUInt;digits:NativeInt);
var
i: NativeUint;
begin
inc(cnt);
number := number*base;
IF digits > 1 then
Begin
For i := minDigit to base-1 do
Munch(number+i,DgtPowSum+DgtPotDgt[i],i,digits-1);
end
else
For i := minDigit to base-1 do
//number is always the arrangement of the digits leading to smallest number
IF (number+i)<= (DgtPowSum+DgtPotDgt[i]) then
IF CheckSameDigits(number+i,DgtPowSum+DgtPotDgt[i]) then
iF number+i>0 then
writeln(Format('%*d %.*d',
[maxDigits,DgtPowSum+DgtPotDgt[i],maxDigits,number+i]));
end;
procedure InitDgtPotDgt;
var
i,k,dgtpow: NativeUint;
Begin
// digit ^ digit ,special case 0^0 here 0
DgtPotDgt[0]:= 0;
For i := 1 to Base-1 do
Begin
dgtpow := i;
For k := 2 to i do
dgtpow := dgtpow*i;
DgtPotDgt[i] := dgtpow;
end;
end;
begin
cnt := 0;
InitDgtPotDgt;
Munch(0,0,0,maxDigits);
writeln('Check Count ',cnt);
end.
</syntaxhighlight>
{{Out}}
<pre> 1 000000001
3435 000003345
438579088 034578889
Check Count 43758 ==
n= maxdigits = 9,k = 10;CombWithRep = (10+9-1))!/(10!*(9-1)!)=43758
real 0m0.002s
</pre>
=={{header|Perl}}==
<syntaxhighlight lang="perl">use List::Util "sum";
for my $n (1..5000) {
print "$n\n" if $n == sum( map { $_**$_ } split(//,$n) );
}</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Phix}}==
<!--(phixonline)-->
<syntaxhighlight lang="phix">
with javascript_semantics
constant powers = sq_power(tagset(9),tagset(9))
function munchausen(integer n)
integer n0 = n
atom total = 0
while n!=0 do
integer r = remainder(n,10)
if r then total += powers[r] end if
n = floor(n/10)
end while
return (total==n0)
end function
for m in tagset(5000) & 438579088 do
if munchausen(m) then ?m end if
end for
</syntaxhighlight>
{{out}}
Checking every number between 5,000 and 438,579,088 would take/waste a couple of minutes, and it wouldn't prove anything unless it went to 99,999,999,999 which would take a ''very'' long time!
<pre>
1
3435
438579088
</pre>
=== Alternative ===
<syntaxhighlight lang="phix">
function munchausen(integer lo, maxlen)
string digits = sprint(lo)
sequence res = {}
integer count = 0, l = length(digits)
atom lim = power(10,l), lom = 0
while length(digits)<=maxlen do
count += 1
atom tot = 0
for j=1 to length(digits) do
integer d = digits[j]-'0'
if d then tot += power(d,d) end if
end for
if tot>=lom and tot<=lim and sort(sprint(tot))=digits then
res &= tot
end if
for j=length(digits) to 0 by -1 do
if j=0 then
digits = repeat('0',length(digits)+1)
lim *= 10
lom = (lom+1)*10-1
exit
elsif digits[j]<'9' then
digits[j..$] = digits[j]+1
exit
end if
end for
end while
return {count,res}
end function
atom t0 = time()
printf(1,"Munchausen 1..4 digits (%d combinations checked): %v\n",munchausen(1,4))
printf(1,"All Munchausen, 0..11 digits (%d combinations): %v\n",munchausen(0,11))
?elapsed(time()-t0)
</syntaxhighlight>
{{out}}
<pre>
Munchausen 1..4 digits (999 combinations checked): {1,3435}
All Munchausen, 0..11 digits (352715 combinations): {0,1,3435,438579088}
"0.3s"
</pre>
=={{header|PHP}}==
<syntaxhighlight lang="php">
<?php
$pwr = array_fill(0, 10, 0);
function isMunchhausen($n)
{
global $pwr;
$sm = 0;
$temp = $n;
while ($temp) {
$sm= $sm + $pwr[($temp % 10)];
$temp = (int)($temp / 10);
}
return $sm == $n;
}
for ($i = 0; $i < 10; $i++) {
$pwr[$i] = pow((float)($i), (float)($i));
}
for ($i = 1; $i < 5000 + 1; $i++) {
if (isMunchhausen($i)) {
echo $i . PHP_EOL;
}
}</syntaxhighlight>
{{out}}
<pre>
1
3435</pre>
=={{header|Picat}}==
<syntaxhighlight lang="picat">go =>
println([N : N in 1..5000, munchhausen_number(N)]).
munchhausen_number(N) =>
N == sum([T : I in N.to_string(),II = I.to_int(), T = II**II]).</syntaxhighlight>
{{out}}
<pre>[1,3435]</pre>
Testing for a larger interval, 1..500 000 000, requires another approach:
<syntaxhighlight lang="picat">go2 ?=>
H = [0] ++ [I**I : I in 1..9],
N = 1,
while (N < 500_000_000)
Sum = 0,
NN = N,
Found = true,
while (NN > 0, Found == true)
Sum := Sum + H[1+(NN mod 10)],
if Sum > N then
Found := false
end,
NN := NN div 10
end,
if Sum == N then
println(N)
end,
N := N+1
end,
nl.
</syntaxhighlight>
{{out}}
<pre>1
3435
438579088</pre>
=={{header|PicoLisp}}==
<syntaxhighlight lang="picolisp">(for N 5000
(and
(=
N
(sum
'((N) (** N N))
(mapcar format (chop N)) ) )
(println N) ) )</syntaxhighlight>
{{out}}
<pre>
1
3435</pre>
=={{header|PL/I}}==
<syntaxhighlight lang="pli">munchausen: procedure options(main);
/* precalculate powers */
declare (pows(0:5), i) fixed;
pows(0) = 0; /* 0^0=0 for Munchausen numbers */
do i=1 to 5; pows(i) = i**i; end;
declare (d1, d2, d3, d4, num, dpow) fixed;
do d1=0 to 5;
do d2=0 to 5;
do d3=0 to 5;
do d4=1 to 5;
num = d1*1000 + d2*100 + d3*10 + d4;
dpow = pows(d1) + pows(d2) + pows(d3) + pows(d4);
if num=dpow then put skip list(num);
end;
end;
end;
end;
end munchausen;</syntaxhighlight>
{{out}}
<pre> 1
3435</pre>
=={{header|Plain English}}==
<syntaxhighlight lang="plainenglish">To run:
Start up.
Show the Munchausen numbers up to 5000.
Wait for the escape key.
Shut down.
To show the Munchausen numbers up to a number:
If a counter is past the number, exit.
If the counter is Munchausen, convert the counter to a string; write the string to the console.
Repeat.
To decide if a number is Munchausen:
Privatize the number.
Find the sum of the digit self powers of the number.
If the number is the original number, say yes.
Say no.
To find the sum of the digit self powers of a number:
If the number is 0, exit.
Put 0 into a sum number.
Loop.
Divide the number by 10 giving a quotient and a remainder.
Put the quotient into the number.
Raise the remainder to the remainder.
Add the remainder to the sum.
If the number is 0, break.
Repeat.
Put the sum into the number.</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|PowerBASIC}}==
{{trans|FreeBASIC}}(Translated from the FreeBasic Version 2 example.)
<syntaxhighlight lang="powerbasic">#COMPILE EXE
#DIM ALL
#COMPILER PBCC 6
DECLARE FUNCTION GetTickCount LIB "kernel32.dll" ALIAS "GetTickCount"() AS DWORD
FUNCTION PBMAIN () AS LONG
LOCAL i, j, n, sum, ten1, ten2, t AS DWORD
LOCAL n0, n1, n2, n3, n4, n5, n6, n7, n8, n9 AS DWORD
LOCAL s1, s2, s3, s4, s5, s6, s7, s8 AS DWORD
DIM pow(9) AS DWORD, num(9) AS DWORD
LOCAL pb AS BYTE PTR
LOCAL number AS STRING
t = GetTickCount()
ten2 = 10
FOR i = 1 TO 9
pow(i) = i
FOR j = 2 TO i
pow(i) *= i
NEXT j
NEXT i
FOR n = 1 TO 11
FOR n9 = 0 TO n
FOR n8 = 0 TO n - n9
s8 = n9 + n8
FOR n7 = 0 TO n - s8
s7 = s8 + n7
FOR n6 = 0 TO n - s7
s6 = s7 + n6
FOR n5 = 0 TO n - s6
s5 = s6 + n5
FOR n4 = 0 TO n - s5
s4 = s5 + n4
FOR n3 = 0 TO n - s4
s3 = s4 + n3
FOR n2 = 0 TO n - s3
s2 = s3 + n2
FOR n1 = 0 TO n - s2
n0 = n - (s2 + n1)
sum = n1 * pow(1) + n2 * pow(2) + n3 * pow(3) + _
n4 * pow(4) + n5 * pow(5) + n6 * pow(6) + _
n7 * pow(7) + n8 * pow(8) + n9 * pow(9)
SELECT CASE AS LONG sum
CASE ten1 TO ten2 - 1
number = LTRIM$(STR$(sum))
pb = STRPTR(number)
MAT num() = ZER
FOR i = 0 TO n -1
j = @pb[i] - 48
INCR num(j)
NEXT i
IF n0 = num(0) AND n1 = num(1) AND n2 = num(2) AND _
n3 = num(3) AND n4 = num(4) AND n5 = num(5) AND _
n6 = num(6) AND n7 = num(7) AND n8 = num(8) AND _
n9 = num(9) THEN CON.PRINT STR$(sum)
END SELECT
NEXT n1
NEXT n2
NEXT n3
NEXT n4
NEXT n5
NEXT n6
NEXT n7
NEXT n8
NEXT n9
ten1 = ten2
ten2 *= 10
NEXT n
t = GetTickCount() - t
CON.PRINT "execution time:" & STR$(t) & " ms; hit any key to end program"
CON.WAITKEY$
END FUNCTION</syntaxhighlight>
{{out}}
<pre> 0
1
3435
438579088
execution time: 78 ms; hit any key to end program</pre>
=={{header|Pure}}==
<syntaxhighlight lang="pure">// split numer into digits
digits n::number = loop n [] with
loop n l = loop (n div 10) ((n mod 10):l) if n > 0;
= l otherwise; end;
munchausen n::int = (filter isMunchausen list) when
list = 1..n; end with
isMunchausen n = n == foldl (+) 0
(map (\d -> d^d)
(digits n)); end;
munchausen 5000;</syntaxhighlight>
{{out}}
<pre>[1,3435]</pre>
=={{header|PureBasic}}==
{{trans|C}}
<syntaxhighlight lang="purebasic">EnableExplicit
Declare main()
If OpenConsole("Munchausen_numbers")
main() : Input() : End
EndIf
Procedure main()
Define i.i,
sum.i,
number.i,
digit.i
For i = 1 To 5000
sum = 0
number = i
While number > 0
digit = number % 10
sum + Pow(digit, digit)
number / 10
Wend
If sum = i
PrintN(Str(i))
EndIf
Next
EndProcedure</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Python}}==
<syntaxhighlight lang="python">for i in range(5000):
if i == sum(int(x) ** int(x) for x in str(i)):
print(i)</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
Or, defining an '''isMunchausen''' predicate in terms of a single fold – rather than a two-pass ''sum'' after ''map'' (or comprehension) –
and reaching for a specialised '''digitToInt''', which turns out to be a little faster than type coercion with the more general built-in '''int()''':
{{Works with|Python|3}}
<syntaxhighlight lang="python">'''Munchausen numbers'''
from functools import (reduce)
# isMunchausen :: Int -> Bool
def isMunchausen(n):
'''True if n equals the sum of
each of its digits raised to
the power of itself.'''
def powerOfSelf(d):
i = digitToInt(d)
return i**i
return n == reduce(
lambda n, c: n + powerOfSelf(c),
str(n), 0
)
# main :: IO ()
def main():
'''Test'''
print(list(filter(
isMunchausen,
enumFromTo(1)(5000)
)))
# GENERIC -------------------------------------------------
# digitToInt :: Char -> Int
def digitToInt(c):
'''The integer value of any digit character
drawn from the 0-9, A-F or a-f ranges.'''
oc = ord(c)
if 48 > oc or 102 < oc:
return None
else:
dec = oc - 48 # ord('0')
hexu = oc - 65 # ord('A')
hexl = oc - 97 # ord('a')
return dec if 9 >= dec else (
10 + hexu if 0 <= hexu <= 5 else (
10 + hexl if 0 <= hexl <= 5 else None
)
)
# enumFromTo :: (Int, Int) -> [Int]
def enumFromTo(m):
'''Integer enumeration from m to n.'''
return lambda n: list(range(m, 1 + n))
if __name__ == '__main__':
main()</syntaxhighlight>
<pre>[1, 3435]</pre>
=={{header|Quackery}}==
<syntaxhighlight lang="quackery"> [ dup 0 swap
[ dup 0 != while
10 /mod dup **
rot + swap again ]
drop = ] is munchausen ( n --> b )
5000 times
[ i^ 1+ munchausen if
[ i^ 1+ echo sp ] ]</syntaxhighlight>
{{out}}
<pre>1 3435 </pre>
=={{header|Racket}}==
<syntaxhighlight lang="text">#lang racket
(define (expt:0^0=1 r p)
(if (zero? r) 0 (expt r p)))
(define (munchausen-number? n (t n))
(if (zero? n)
(zero? t)
(let-values (([q r] (quotient/remainder n 10)))
(munchausen-number? q (- t (expt:0^0=1 r r))))))
(module+ main
(for-each displayln (filter munchausen-number? (range 1 (add1 5000)))))
(module+ test
(require rackunit)
;; this is why we have the (if (zero? r)...) test
(check-equal? (expt 0 0) 1)
(check-equal? (expt:0^0=1 0 0) 0)
(check-equal? (expt:0^0=1 0 4) 0)
(check-equal? (expt:0^0=1 3 4) (expt 3 4))
;; given examples
(check-true (munchausen-number? 1))
(check-true (munchausen-number? 3435))
(check-false (munchausen-number? 3))
(check-false (munchausen-number? -45) "no recursion on -ve numbers"))</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|
(formerly Perl 6)
<syntaxhighlight lang="raku" line>sub is_munchausen ( Int $n ) {
constant @powers = 0, |map { $_ ** $_ }, 1..9;
$n == @powers[$n.comb].sum;
}
.say if .&is_munchausen for 1..5000;</
{{out}}
<pre>1
Line 294 ⟶ 2,589:
=={{header|REXX}}==
===version 1===
<syntaxhighlight lang="rexx">Do n=0 To 10000
If n=m(n) Then
Say n
Line 305 ⟶ 2,601:
res=res+c**c
End
Return res</
{{out}}
<pre>D:\mau>rexx munch
1
3435
</pre>
===version 2===
This REXX version uses the requirement that '''0**0''' equals zero.
It is about '''2.5''' times faster than REXX version 1.
For the high limit of '''5,000''', optimization isn't needed. But for much higher limits, optimization becomes significant.
<syntaxhighlight lang="rexx">/*REXX program finds and displays Münchhausen numbers from one to a specified number (Z)*/
@.= 0; do i=1 for 9; @.i= i**i; end /*precompute powers for non-zero digits*/
parse arg z . /*obtain optional argument from the CL.*/
if z=='' | z=="," then z= 5000 /*Not specified? Then use the default.*/
@is='is a Münchhausen number.'; do j=1 for z /* [↓] traipse through all the numbers*/
if isMunch(j) then say right(j, 11) @is
end /*j*/
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
isMunch: parse arg x 1 ox; $= 0; do until x=='' | $>ox /*stop if too large.*/
parse var x _ +1 x; $= $ + @._ /*add the next power*/
end /*while*/ /* [↑] get a digit.*/
return $==ox /*it is or it ain't.*/</syntaxhighlight>
{{out|output|text= when using the default input:}}
<pre>
1 is a Münchhausen number.
3435 is a Münchhausen number.
</pre>
===version 3===
It is about '''3''' times faster than REXX version 1.
<syntaxhighlight lang="rexx">/*REXX program finds and displays Münchhausen numbers from one to a specified number (Z)*/
@.= 0; do i=1 for 9; @.i= i**i; end /*precompute powers for non-zero digits*/
parse arg z . /*obtain optional argument from the CL.*/
if z=='' | z=="," then z= 5000 /*Not specified? Then use the default.*/
@is='is a Münchhausen number.'; do j=1 for z /* [↓] traipse through all the numbers*/
if isMunch(j) then say right(j, 11) @is
end /*j*/
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
isMunch: parse arg a 2 b 3 c 4 d 5 e 6 x 1 ox; $=@.a+@.b+@.c+@.d+@.e /*sum 1st 5 digits.*/
if $>ox then return 0 /*is sum too large?*/
do while x\=='' & $<=ox /*any more digits ?*/
parse var x _ +1 x; $= $ + @._ /*sum 6th & up digs*/
end /*while*/
return $==ox /*it is or it ain't*/</syntaxhighlight>
{{out|output|text= is the same as the 2<sup>nd</sup> REXX version.}} <br><br>
=={{header|Ring}}==
<syntaxhighlight lang="ring">
# Project : Munchausen numbers
limit = 5000
for n=1 to limit
sum = 0
msum = string(n)
for m=1 to len(msum)
ms = number(msum[m])
sum = sum + pow(ms, ms)
next
if sum = n
see n + nl
ok
next
</syntaxhighlight>
Output:
<pre>
1
3435
</pre>
=={{header|RPL}}==
≪ { } 1 5000 '''FOR''' j
j →STR DUP SIZE 0 1 ROT '''FOR''' k
OVER k DUP SUB STR→ DUP ^ +
'''NEXT'''
SWAP DROP
'''IF''' j == '''THEN''' j + '''END'''
'''NEXT'''
≫
EVAL
{{out}}
<pre>
1: { 1 3435 }
</pre>
=={{header|Ruby}}==
<syntaxhighlight lang="ruby"> puts (1..5000).select{|n| n.digits.sum{|d| d**d} == n}</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|Rust}}==
<syntaxhighlight lang="rust">fn main() {
let mut solutions = Vec::new();
for num in 1..5_000 {
let power_sum = num.to_string()
.chars()
.map(|c| {
let digit = c.to_digit(10).unwrap();
(digit as f64).powi(digit as i32) as usize
})
.sum::<usize>();
if power_sum == num {
solutions.push(num);
}
}
println!("Munchausen numbers below 5_000 : {:?}", solutions);
}</syntaxhighlight>
{{out}}
<pre>
Munchausen numbers below 5_000 : [1, 3435]
</pre>
=={{header|Scala}}==
Adapted from Zack Denton's code posted on [https://zach.se/munchausen-numbers-and-how-to-find-them/ Munchausen Numbers and How to Find Them].
<syntaxhighlight lang="scala">
object Munch {
def main(args: Array[String]): Unit = {
Line 324 ⟶ 2,735:
}
}
</syntaxhighlight>
{{out}}
<pre>1 (munchausen)
3435 (munchausen)</pre>
=={{header|SETL}}==
<syntaxhighlight lang="setl">program munchausen_numbers;
loop for n in [1..5000] | munchausen n do
print(n);
end loop;
op munchausen(n);
m := n;
loop while m>0 do
d := m mod 10;
m div:= 10;
sum +:= d ** d;
end loop;
return sum = n;
end op;
end program;</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Sidef}}==
<
n.digits.map{|d| d**d }.sum == n
}
say (1..5000 -> grep(is_munchausen))</
{{out}}
<pre>
[1, 3435]
</pre>
=={{header|SuperCollider}}==
<syntaxhighlight lang="supercollider">(1..5000).select { |n| n == n.asDigits.sum { |x| pow(x, x) } }</syntaxhighlight>
<pre>
[1, 3435]
</pre>
=={{header|Swift}}==
<syntaxhighlight lang="swift">import Foundation
func isMünchhausen(_ n: Int) -> Bool {
let nums = String(n).map(String.init).compactMap(Int.init)
return Int(nums.map({ pow(Double($0), Double($0)) }).reduce(0, +)) == n
}
for i in 1...5000 where isMünchhausen(i) {
print(i)
}</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|Symsyn}}==
<syntaxhighlight lang="symsyn">
x : 10 1
(2^2) x.2
(3^3) x.3
(4^4) x.4
(5^5) x.5
(6^6) x.6
(7^7) x.7
(8^8) x.8
(9^9) x.9
1 i
if i <= 5000
~ i $i | convert binary to string
#$i j | length to j
y | set y to 0
if j > 0
$i.j $j 1 | move digit j to string j
~ $j n | convert j string to binary
+ x.n y | add value x at n to y
- j | dec j
goif
endif
if i = y
i [] | output to console
endif
+ i
goif
endif
</syntaxhighlight>
{{out}}
<pre>1
3435</pre>
=={{header|TI-83 BASIC}}==
{{works with|TI-83 BASIC|TI-84Plus 2.55MP}}
{{trans|Fortran}}
<syntaxhighlight lang="ti83b"> For(I,1,5000)
0→S:I→K
For(J,1,4)
10^(4-J)→D
iPart(K/D)→N
remainder(K,D)→R
If N≠0:S+N^N→S
R→K
End
If S=I:Disp I
End </syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
Execution time: 15 min
===Optimized Version===
{{trans|BASIC}}
This takes advantage of the fact that N^N > 9999 for any single digit natural number N where N > 6. It also uses a look up table for powers to allow the assumption that 0^0 = 1.
<syntaxhighlight lang="ti83b">{1,1,4,27,256,3125}→L₁
For(A,0,5,1)
For(B,0,5,1)
For(C,0,5,1)
For(D,0,5,1)
A*1000+B*100+C*10+D→N
L₁(D+1)→M
If N≥10
M+L₁(C+1)→M
If N≥100
M+L₁(B+1)→M
If N≥1000
M+L₁(A+1)→M
If N=M
Disp N
End
End
End
End</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
Execution time: 2 minutes 20 seconds
=={{header|VBA}}==
<syntaxhighlight lang="vb">
Option Explicit
Sub Main_Munchausen_numbers()
Dim i&
For i = 1 To 5000
If IsMunchausen(i) Then Debug.Print i & " is a munchausen number."
Next i
End Sub
Function IsMunchausen(Number As Long) As Boolean
Dim Digits, i As Byte, Tot As Long
Digits = Split(StrConv(Number, vbUnicode), Chr(0))
For i = 0 To UBound(Digits) - 1
Tot = (Digits(i) ^ Digits(i)) + Tot
Next i
IsMunchausen = (Tot = Number)
End Function
</syntaxhighlight>
{{out}}
<pre>1 is a munchausen number.
3435 is a munchausen number.</pre>
=={{header|VBScript}}==
<syntaxhighlight lang="vbscript">
for i = 1 to 5000
if Munch(i) Then
Wscript.Echo i, "is a Munchausen number"
end if
next
'Returns True if num is a Munchausen number. This is true if the sum of
'each digit raised to that digit's power is equal to the given number.
'Example: 3435 = 3^3 + 4^4 + 3^3 + 5^5
Function Munch (num)
dim str: str = Cstr(num) 'input num as a string
dim sum: sum = 0 'running sum of n^n
dim i 'loop index
dim n 'extracted digit
for i = 1 to len(str)
n = CInt(Mid(str,i,1))
sum = sum + n^n
next
Munch = (sum = num)
End Function
</syntaxhighlight>
{{out}}
<pre>
1 is a Munchausen number
3435 is a Munchausen number
</pre>
=={{header|Visual Basic}}==
{{trans|FreeBASIC}}(Translated from the FreeBasic Version 2 example.)
<syntaxhighlight lang="vb">Option Explicit
Declare Function GetTickCount Lib "kernel32.dll" () As Long
Declare Sub ZeroMemory Lib "kernel32.dll" Alias "RtlZeroMemory" (ByRef Destination As Any, ByVal Length As Long)
Sub Main()
Dim i As Long, j As Long, n As Long, t As Long
Dim sum As Double
Dim n0 As Double
Dim n1 As Double
Dim n2 As Double
Dim n3 As Double
Dim n4 As Double
Dim n5 As Double
Dim n6 As Double
Dim n7 As Double
Dim n8 As Double
Dim n9 As Double
Dim ten1 As Double
Dim ten2 As Double
Dim s1 As Long
Dim s2 As Long
Dim s3 As Long
Dim s4 As Long
Dim s5 As Long
Dim s6 As Long
Dim s7 As Long
Dim s8 As Long
Dim pow(9) As Long, num(9) As Long
Dim number As String, res As String
t = GetTickCount()
ten2 = 10
For i = 1 To 9
pow(i) = i
For j = 2 To i
pow(i) = i * pow(i)
Next j
Next i
For n = 1 To 11
For n9 = 0 To n
For n8 = 0 To n - n9
s8 = n9 + n8
For n7 = 0 To n - s8
s7 = s8 + n7
For n6 = 0 To n - s7
s6 = s7 + n6
For n5 = 0 To n - s6
s5 = s6 + n5
For n4 = 0 To n - s5
s4 = s5 + n4
For n3 = 0 To n - s4
s3 = s4 + n3
For n2 = 0 To n - s3
s2 = s3 + n2
For n1 = 0 To n - s2
n0 = n - (s2 + n1)
sum = n1 * pow(1) + n2 * pow(2) + n3 * pow(3) + _
n4 * pow(4) + n5 * pow(5) + n6 * pow(6) + _
n7 * pow(7) + n8 * pow(8) + n9 * pow(9)
Select Case sum
Case ten1 To ten2 - 1
number = CStr(sum)
ZeroMemory num(0), 40
For i = 1 To n
j = Asc(Mid$(number, i, 1)) - 48
num(j) = num(j) + 1
Next i
If n0 = num(0) Then
If n1 = num(1) Then
If n2 = num(2) Then
If n3 = num(3) Then
If n4 = num(4) Then
If n5 = num(5) Then
If n6 = num(6) Then
If n7 = num(7) Then
If n8 = num(8) Then
If n9 = num(9) Then
res = res & CStr(sum) & vbNewLine
End If
End If
End If
End If
End If
End If
End If
End If
End If
End If
End Select
Next n1
Next n2
Next n3
Next n4
Next n5
Next n6
Next n7
Next n8
Next n9
ten1 = ten2
ten2 = ten2 * 10
Next n
t = GetTickCount() - t
res = res & "execution time:" & Str$(t) & " ms"
MsgBox res
End Sub</syntaxhighlight>
{{out}}
<pre> 0
1
3435
438579088
execution time: 156 ms</pre>
=={{header|Visual Basic .NET}}==
{{trans|FreeBASIC}}(Translated from the FreeBasic Version 2 example.)<br/>
Computation time is under 4 seconds on tio.run.
<syntaxhighlight lang="vbnet">Imports System
Module Program
Sub Main()
Dim i, j, n, n1, n2, n3, n4, n5, n6, n7, n8, n9, s2, s3, s4, s5, s6, s7, s8 As Integer,
sum, ten1 As Long, ten2 As Long = 10
Dim pow(9) As Long, num() As Byte
For i = 1 To 9 : pow(i) = i : For j = 2 To i : pow(i) *= i : Next : Next
For n = 1 To 11 : For n9 = 0 To n : For n8 = 0 To n - n9 : s8 = n9 + n8 : For n7 = 0 To n - s8
s7 = s8 + n7 : For n6 = 0 To n - s7 : s6 = s7 + n6 : For n5 = 0 To n - s6
s5 = s6 + n5 : For n4 = 0 To n - s5 : s4 = s5 + n4 : For n3 = 0 To n - s4
s3 = s4 + n3 : For n2 = 0 To n - s3 : s2 = s3 + n2 : For n1 = 0 To n - s2
sum = n1 * pow(1) + n2 * pow(2) + n3 * pow(3) + n4 * pow(4) +
n5 * pow(5) + n6 * pow(6) + n7 * pow(7) + n8 * pow(8) + n9 * pow(9)
If sum < ten1 OrElse sum >= ten2 Then Continue For
redim num(9)
For Each ch As Char In sum.ToString() : num(Convert.ToByte(ch) - 48) += 1 : Next
If n - (s2 + n1) = num(0) AndAlso n1 = num(1) AndAlso n2 = num(2) AndAlso
n3 = num(3) AndAlso n4 = num(4) AndAlso n5 = num(5) AndAlso n6 = num(6) AndAlso
n7 = num(7) AndAlso n8 = num(8) AndAlso n9 = num(9) Then Console.WriteLine(sum)
Next : Next : Next : Next : Next : Next : Next : Next : Next
ten1 = ten2 : ten2 *= 10
Next
End Sub
End Module</syntaxhighlight>
{{out}}
<pre>0
1
3435
438579088</pre>
=={{header|Wren}}==
<syntaxhighlight lang="wren">var powers = List.filled(10, 0)
for (i in 1..9) powers[i] = i.pow(i).round // cache powers
var munchausen = Fn.new {|n|
if (n <= 0) Fiber.abort("Argument must be a positive integer.")
var nn = n
var sum = 0
while (n > 0) {
var digit = n % 10
sum = sum + powers[digit]
n = (n/10).floor
}
return nn == sum
}
System.print("The Munchausen numbers <= 5000 are:")
for (i in 1..5000) {
if (munchausen.call(i)) System.print(i)
}</syntaxhighlight>
{{out}}
<pre>
The Munchausen numbers <= 5000 are:
1
3435
</pre>
=={{header|XPL0}}==
The digits 6, 7, 8 and 9 can't occur because 6^6 = 46656, which is beyond 5000.
<syntaxhighlight lang="xpl0">int Pow, A, B, C, D, N;
[Pow:= [0, 1, 4, 27, 256, 3125];
for A:= 0 to 5 do
for B:= 0 to 5 do
for C:= 0 to 5 do
for D:= 0 to 5 do
[N:= A*1000 + B*100 + C*10 + D;
if Pow(A) + Pow(B) + Pow(C) + Pow(D) = N then
if N>=1 & N<= 5000 then
[IntOut(0, N); CrLf(0)];
];
]</syntaxhighlight>
{{out}}
<pre>
1
3435
</pre>
=={{header|zkl}}==
<
.println();</
{{out}}
<pre>
| |||