xgogoforit的博客

题目连接http://poj.org/problem?id=2386DescriptionDue to recent rains, water has pooled in various places in Farmer John’s field, which is represented by a rectangle of N x M (1 <= N <= 100; 1 <= M <= 100)

题目连接http://acm.uestc.edu.cn/#/problem/show/1252Description24点就是给你一串数字，问你是否通过加减乘除括号构成24点。 沈爷觉得这个很好玩，就决定考考你，给你4个数，可以交换位置，可以用加减乘除和括号，是否能构成24点呢？ 注意哦~这里的除法并不是整数除法，比如样例Input第一行T，表示有多少组测试数据，1≤T≤50接下来T行，每行4个

题目连接http://poj.org/problem?id=1979DescriptionThere is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. From a tile, he can mov

题目连接http://codeforces.com/contest/653/problem/BDescriptionLimak is a little polar bear. Polar bears hate long strings and thus they like to compress them. You should also know that Limak is so young th