codeforces Educational Codeforces Round 54 (Rated for Div. 2) 题解
。。。。此次Div2就做了两个题目,第一个题目wa了4次,22分钟出的,第二道题目一遍过,18分钟,然后看到c题感觉样例好玄学,就捣鼓浮点数去了,没想到是二元一次方程求解。。。还是太蠢了。A:You are given a string s consisting of n lowercase Latin letters.You have to remove at most one (i...