题解

按照题目进行解题

#include<bits/stdc++.h>
using namespace std;
int main(){
    string str;
    cin >> str;
    int n;
    cin >> n;
    while(n--){
        string op;
        cin >> op;
        if(op == "1") {
            cin >> op;
            str += op;
        } else if(op == "2") {
            cout << str.size() << endl;
        } else if(op == "3"){
            cin >> op;
            cout << max(op,str) << endl;
        }
    }
    return 0;
}