晚训视频讲解B站链接点击进去 晚训题目地址https://vjudge.net/contest/615340 A题参考程序 #include<bits/stdc++.h>using namespace std;char s[105];int main(){scanf("%s",s+1);int n=strlen(s+1);int ok=0;for(int i=1;i<=n;i++){if