2020年6月22日
D. Task On The Board
摘要： Polycarp wrote on the board a string ss containing only lowercase Latin letters ('a'-'z'). This string is known for you and given in the input. After 阅读全文
posted @ 2020-06-22 12:11 DeaL57 阅读(254) 评论(0) 推荐(0)
I - Coins
摘要： Problem Statement Let NN be a positive odd number. There are NN coins, numbered 1,2,…,N1,2,…,N. For each ii (1≤i≤N1≤i≤N), when Coin ii is tossed, it c 阅读全文
posted @ 2020-06-22 10:41 DeaL57 阅读(198) 评论(0) 推荐(0)
Scout YYF I
摘要： Description YYF is a couragous scout. Now he is on a dangerous mission which is to penetrate into the enemy's base. After overcoming a series difficul 阅读全文
posted @ 2020-06-22 09:45 DeaL57 阅读(175) 评论(0) 推荐(0)