Cheryl's birthday

From Rosetta Code
Revision as of 07:45, 22 October 2018 by rosettacode>Amirt (Find the birthday of Cheryl!)
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Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gave them a list of 10 possible dates:

May 15 May 16 May 19 June 17 June 18 July 14 July 16 August 14 August 15 August 17

Cheryl then tells Albert and Bernard separately the month and the day of the birthday respectively. 1) Albert: I don't know when Cheryl's birthday is, but I know that Bernard does not know too. 2) Bernard: At first I don't know when Cheryl's birthday is, but I know now. 3) Albert: Then I also know when Cheryl's birthday is. So when is Cheryl's birthday?

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