摘要: D. Swaps in Permutation 题目连接: http://www.codeforces.com/contest/691/problem/D Description You are given a permutation of the numbers 1, 2, ..., n and 阅读全文
posted @ 2016-08-01 15:16 qscqesze 阅读(416) 评论(2) 推荐(0) 编辑
摘要: C. Exponential notation 题目连接: http://www.codeforces.com/contest/691/problem/C Description You are given a positive decimal number x. Your task is to c 阅读全文
posted @ 2016-08-01 15:04 qscqesze 阅读(409) 评论(0) 推荐(0) 编辑
摘要: B. s palindrome 题目连接: http://www.codeforces.com/contest/691/problem/B Description Let's call a string "s palindrome" if it is symmetric about the midd 阅读全文
posted @ 2016-08-01 14:27 qscqesze 阅读(772) 评论(0) 推荐(0) 编辑