C++ 代码

#include<iostream>

using namespace std;

int main(){
    string a, b;
    while(cin >> a >> b){
        string d;
        int max = -1, cnt = 0;
        for(int i = 0; i < a.length(); i++){
            if(max < a[i]) max = a[i], cnt = i;
        }
        cout << a.substr(0, cnt + 1) + b + a.substr(cnt+ 1);
        cout << endl;

    }
    return 0;
}