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There is a tree of n vertices. For each vertex a list of all its successors is known (not only direct ones). It is required to restore the tree or to 阅读全文
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Bob and Alice are playing a new game. There are n boxes which have been numbered from 1 to n. Each box is either empty or contains several cards. Bob 阅读全文
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E. Explosion Exploit time limit per test 2.0 s memory limit per test 256 MB input standard input output standard output E. Explosion Exploit time limi 阅读全文
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Calendar Game Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6052 Accepted Submission(s): 3618 P 阅读全文
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Every year, Farmer John's N (1 <= N <= 20,000) cows attend "MooFest",a social gathering of cows from around the world. MooFest involves a variety of e 阅读全文
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Firing Time Limit: 5000MS Memory Limit: 131072K Total Submissions: 12108 Accepted: 3666 Description You’ve finally got mad at “the world’s most stupid 阅读全文
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Transferring Sylla Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 3533 Accepted: 988 Description After recapturing Sylla, the Company plan 阅读全文