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题目:http://codeforces.com/contest/1175/problem/B B. Catch Overflow! time limit per test 1 second memory limit per test 256 megabytes input standard inp 阅读全文
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题目:https://codeforces.com/contest/1200/problem/C C. Round Corridor time limit per test 1 second memory limit per test 256 megabytes input standard inp 阅读全文
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题目:http://codeforces.com/contest/1204/problem/C C. Anna, Svyatoslav and Maps time limit per test 2 seconds memory limit per test 256 megabytes input s 阅读全文