摘要：
http://codeforces.com/contest/1029/problem/D You are given an array aa, consisting of nn positive integers. Let's call a concatenation of numbers xx a 阅读全文
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http://codeforces.com/contest/1029/problem/A You are given a string tt consisting of nn lowercase Latin letters and an integer number kk. Let's define 阅读全文
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http://codeforces.com/contest/1066/problem/E You are given two huge binary integer numbers aa and bb of lengths nn and mm respectively. You will repea 阅读全文
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http://codeforces.com/contest/1029/problem/B You are given a problemset consisting of nn problems. The difficulty of the ii-th problem is aiai. It is 阅读全文
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http://codeforces.com/contest/1029/problem/C You are given nn segments on a number line; each endpoint of every segment has integer coordinates. Some 阅读全文