摘要: #include <bits/stdc++.h> using namespace std; int main() { map<char,int> mp; mp['a']++; if (mp['b'] == 0) printf("OK"); printf("%d\n",(int)mp.size()); 阅读全文
posted @ 2021-07-08 00:06 kjd123456 阅读(21) 评论(0) 推荐(0) 编辑