I'm trying to solve problem Game of Cards from SWERC-2015.

I guess, that this game is equivalent to Nim game. I calculated the Sprague-Grandy value from every pile of cards and counted xor of them.

Unfortunately, my solution gets WA on 7 test.

Please, help me with this problem.

Code

Hello.

Could you give me any hint for this problem, please?

I solve a problem on the Timus Online Judge.

Submit with hashing gets WA31(because of antihash). But submit with double hashing gets WA8...

Help me, please, with double hashing and solve this problem.

I want to solve problems from USACO like "virtual contest". But i have not found, what time I should set. Help me, please.

Sorry for my bad English.

Hi everybody! I am a student and preparing for my third ACM-ICPC season.

Recently, I found a site ICPC Live Archive, which contains many problems from different regionals competitions of past years. I solved some problems from here, but some of them are very easy for me, and some are very difficult. I think, that these problems more suitable for team trainigs, not individual (I haven't a stable team). Also, I solve a problems from school olympiads (USACO, National OI's and etc). In my opinion, these problems more suitable for individual trainings. Also, many of them "less standard", then student problems.

I want to know, how many people solve school problems for preparing to ACM-ICPC? And which problems are more suitable for it?

Sorry for my bad English.