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Day 2 7:26 2016/8/25 新的一天又开始了！ 走在上学的路上，抬头看看北京少有的蓝天，太阳的威力不再那么明显，甚至输给了挡住它的云朵。迎面吹来了凉爽的风，夏天的燥热，早已无影无踪。 许多新初一的小同学也在这时穿着军装，一个个在家长的陪同下走进校门，临别时还不忘给爸爸妈妈一个拥抱。今天 阅读全文
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[BZOJ1220][POJ1091][HNOI2002]跳蚤 试题描述 Z城市居住着很多只跳蚤。在Z城市周六生活频道有一个娱乐节目。一只跳蚤将被请上一个高空钢丝的正中央。钢丝很长，可以看作是无限长。节目主持人会给该跳蚤发一张卡片。卡片上写有N+1个自然数。其中最后一个是M，而前N个数都不超过M，卡 阅读全文
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[POJ1936]All in All 试题描述 You have devised a new encryption technique which encodes a message by inserting between its characters randomly generated st 阅读全文
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[Educational Codeforces Round 16]E. Generate a String 试题描述 zscoder wants to generate an input file for some programming competition problem. His input 阅读全文
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[Educational Codeforces Round 16]D. Two Arithmetic Progressions 试题描述 You are given two arithmetic progressions: a1k + b1 and a2l + b2. Find the number 阅读全文
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[Educational Codeforces Round 16]C. Magic Odd Square 试题描述 Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and 阅读全文
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[Educational Codeforces Round 16]B. Optimal Point on a Line 试题描述 You are given n points on a line with their coordinates xi. Find the point x so the s 阅读全文
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[Educational Codeforces Round 16]A. King Moves 试题描述 The only king stands on the standard chess board. You are given his position in format "cd", where 阅读全文