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[POJ1007]DNA Sorting 试题描述 One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each o 阅读全文
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昨天忘记写了，因为急着去看 51nod 比赛，然而思考了许久还是一道都不会，好菜啊T_T。。。 补一下 Day 3 的情况。 Day 3 上午还是常规地做 vjudge 上的套题，硬着头皮啃英文，感觉我都要老眼昏花了。 第一题真是，又出博弈题，一到了这种题我就蒙了，根本不会思考，毕竟平时下棋打牌不多 阅读全文
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[codeforces 293]A. Weird Game 试题描述 Yaroslav, Andrey and Roman can play cubes for hours and hours. But the game is for three, so when Roman doesn't sho 阅读全文
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[codeforces 293]B. Distinct Paths 试题描述 You have a rectangular n × m-cell board. Some cells are already painted some of k colors. You need to paint eac 阅读全文
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[codeforces 235]A. LCM Challenge 试题描述 Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I 阅读全文
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[codeforces 325]B. Stadium and Games 试题描述 Daniel is organizing a football tournament. He has come up with the following tournament format: In the firs 阅读全文