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pc problems
Problem Name Online Judge Contest Difficulty Level
1 Blue Mary Needs Help Again Categories SPOJ 3
2 Mike and Feet Categories Codeforces Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) 3
3 A and B and Interesting Substrings Categories Codeforces Codeforces Round #294 (Div. 2) 3
4 Powerful array Categories Codeforces Yandex.Algorithm 2011 Round 2 3
5 Sereja and Brackets Categories Codeforces Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) 3