题解 | #删除字符串中出现次数最少的字符#

#include <iostream>
#include <string>
#include <map>
#include <bits/stdc++.h>
using namespace std;

int main() {
    string in;
    while(cin>>in){
        map<char, int> chs;
        for(auto ch:in)
            chs[ch]++;
        int cnt_min = chs[in[0]];
        for(auto it:chs)
            if(cnt_min > it.second)
                cnt_min = it.second;
        for(auto ch:in)
            if(chs[ch]>cnt_min)
                cout << ch;
    }
}
// 64 位输出请用 printf("%lld")