摘要：
For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a game of Ultim 阅读全文
摘要：
The WHU ACM Team has a big cup, with which every member drinks water. Now, we know the volume of the water in the cup, can you tell us it height? The 阅读全文
摘要：
There 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 c 阅读全文
摘要：
题目链接：http://codeforces.com/contest/612/problem/C 解题思路： 题意就是要求判断这个序列是否为RBS，每个开都要有一个和它对应的关，如：<()>满足条件,但<(>)就不满足条件，反正直接就是用栈做就行了，完美符合题目要求。 阅读全文
摘要：
题目链接：http://codeforces.com/problemset/problem/612/B 解题思路： 一开始看错了题意，他要求的是从1-n所耗费的时间，n表示的是数值而不是下标， 实现代码： 阅读全文