题解 | #删除字符串中出现次数最少的字符#

#include <climits>
#include <iostream>
using namespace std;

int main() {
    int charnum[26] = {};
    string s;
    cin >> s;
    for (char c : s) {
        charnum[c-'a']++;
    }
    int minn = INT_MAX;
    for (int i=0; i<26; i++){
        if (charnum[i] < minn && charnum[i]!=0)
            minn = charnum[i];
    }
    for (char c:s){
        if (charnum[c-'a']!=minn) cout<<c;
    }
}