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Color it Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Problem Description Do you like painting? Little D doesn 阅读全文
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Query on A Tree Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Problem Description Monkey A lives on a tree, he 阅读全文
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Subsequence Count Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 256000/256000 K (Java/Others) Problem Description Given a binary string S[1,.. 阅读全文
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A Secret Problem Description Today is the birthday of SF,so VS gives two strings S1,S2 to SF as a present,which have a big secret.SF is interested in 阅读全文
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4197: [Noi2015]寿司晚宴 Description 为了庆祝 NOI 的成功开幕,主办方为大家准备了一场寿司晚宴。小 G 和小 W 作为参加 NOI 的选手,也被邀请参加了寿司晚宴。 在晚宴上,主办方为大家提供了 n−1 种不同的寿司,编号 1,2,3,…,n−1,其中第 i 种寿司的美 阅读全文
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Give out candies Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others) Problem Description There are n children numbered 阅读全文
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Free from square Problem Description There is a set including all positive integers that are not more then n. HazelFan wants to choose some integers f 阅读全文
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Fleet of the Eternal Throne Problem Description > The Eternal Fleet was built many centuries ago before the time of Valkorion by an unknown race on th 阅读全文