Colorful numbers: Difference between revisions
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Total colorful numbers: 57256</pre>
=={{header|Ruby}}==
All colorful candidates larger than 1 digit must be a permutation of digits [2,3,4,5,6,7,8,9], so test only those:
<syntaxhighlight lang="ruby">def colorful?(ar)
prods = []
(1..ar.size).all? do |chunk_size|
ar.each_cons(chunk_size) do |chunk|
product = chunk.inject(&:*)
return false if prods.include?(product)
prods << product
end
end
end
less100 = (0..100).select{|n| colorful?(n.digits)}
puts "The colorful numbers less than 100 are:\n #{less100.join(" ")}"
puts "\nLargest colorful number: #{(98765432.downto(1).detect{|n| colorful?(n.digits) })}"
puts
total = 0
(1..8).each do |numdigs|
digits = (numdigs == 1 ? (0..9).to_a : (2..9).to_a)
count = digits.permutation(numdigs).count{|perm| colorful?(perm)}
puts "#{numdigs} digit colorful numbers count: #{count}"
total += count
end
puts "\nTotal colorful numbers: #{total}"
</syntaxhighlight>
{{out}}
<pre>
The colorful numbers less than 100 are:
0 1 2 3 4 5 6 7 8 9 23 24 25 26 27 28 29 32 34 35 36 37 38 39 42 43 45 46 47 48 49 52 53 54 56 57 58 59 62 63 64 65 67 68 69 72 73 74 75 76 78 79 82 83 84 85 86 87 89 92 93 94 95 96 97 98
Largest colorful number: 98746253
1 digit colorful numbers count: 10
2 digit colorful numbers count: 56
3 digit colorful numbers count: 328
4 digit colorful numbers count: 1540
5 digit colorful numbers count: 5514
6 digit colorful numbers count: 13956
7 digit colorful numbers count: 21596
8 digit colorful numbers count: 14256
Total colorful numbers: 57256
</pre>
=={{header|Wren}}==
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