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题目链接：http://codeforces.com/contest/1028/problems A. Find Square（水题） 题意：考虑一个大小为n×m的表，最初是全白色的。 行从上到下编号为1到n，从左到右编号为1到m列。 桌子内部的一些方形，边长为奇数，漆成黑色。 找到这个广场的中心。 题解：数据量并不是很大可以直接暴力找出有效坐标点求中间即可。 AC代码： #inclu...

A. Integer Sequence Dividing You are given an integer sequence 1,2,…,n. You have to divide it into two sets A and B in such a way that each element belongs to exactly one set and |sum(A)−sum(B)| is m...

A. Snowball Today’s morning was exceptionally snowy. Meshanya decided to go outside and noticed a huge snowball rolling down the mountain! Luckily, there are two stones on that mountain. Initially, s...

A. Repeating Cipher Polycarp loves ciphers. He has invented his own cipher called repeating. Repeating cipher is used for strings. To encrypt the string s=s1s2…sm(1≤m≤101≤m≤10)s=s_1s_2…s_m(1≤m≤101≤m≤...