qq_42711300的博客

You are given three positive integersN,x,yPlease calculate how many permutations of1∼N satisfies the following conditions (We denote thei-th number of a permutation bypi):1.p1=x2.pN=y3. fo...

链接：https://ac.nowcoder.com/acm/contest/885/G来源：牛客网You are given two strings s and t composed by digits (characters '0' ∼\sim∼ '9'). The length of s is n and the length of t is m. The first character...

链接地址：https://atcoder.jp/contests/abc135/tasks/abc135_dTime Limit: 2 sec / Memory Limit: 1024 MBScore : 400pointsProblem StatementGiven is a stringS. Each character inSis either a digit (0,...