2018年4月12日
CodeForces - 828C String Reconstruction 并查集（next跳）
摘要： String Reconstruction Ivan had string s consisting of small English letters. However, his friend Julia decided to make fun of him and hid the string s 阅读全文
posted @ 2018-04-12 17:01 yzm10 阅读(290) 评论(0) 推荐(0)
HDU - 3664 Permutation Counting 排列规律dp
摘要： Permutation Counting Given a permutation a1, a2, … aN of {1, 2, …, N}, we define its E-value as the amount of elements where ai > i. For example, the 阅读全文
posted @ 2018-04-12 16:52 yzm10 阅读(323) 评论(0) 推荐(0)