Discussion @ 1362. Classmates 2 @ Timus Online Judge

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Discussion of Problem 1362. Classmates 2

{AESC USU} Evgeny Kurpilyanskij please. Help me!! I have WA#4 // Problem 1362. Classmates 2 12 Mar 2007 18:21

I think my algo is right(DP) but I have WA#4.
Anyone gives me some tests or hint.

P.S. Sorry my English.