五个数据，AC1 WA5$\\$

题目传送门$\\$

$Code$

#include <bits/stdc++.h>
using namespace std;
int main() {
    int t;
    string s;
    cin >> t >> s;
    while (t--) {
        int k,n,a,b;
        string data;
        cin >> k;
        if (k == 1) {
            cin >> data;
            s += data;
            cout << s << endl;
        }
        if (k == 2) {
            cin >> a >> b;
            s = s.substr(a,b);
            cout << s << endl;
        }
        if (k == 3) {
            cin >> n >> data;
            s.insert(n,data);
            cout << s << endl;
        }
        if (k == 4) {
            cin >> data;
            cout << s.find(data);
        }
    }
    return 0;
}

有没有dalao或者神犇能帮我调一下$\\$

thx.