Minimize the String

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

vector<string> ar; //Array te MLE dey dekhe vector nisilam, still MLE at test 4

int main()
{
    int n;
    string s, k;
    scanf("%d", &n);
    cin>>s;
    ar.push_back(s);
    for (int i=0; i<n; i++) {
        k=s;
        k.erase(k.begin()+i);
        ar.push_back(k);
    }
    //int d=j-1;
    sort(ar.begin(), ar.end());
    cout<<ar[0]<<endl;
    return 0;
}