#include <bits/stdc++.h>

using namespace std;

int minimumNumber(int n, string password) {
    if(n==6)
    {
        if((n==0) || (n==1) || (n==2) || (n==3) || (n==4) || (n==5) || (n==6) || (n==7) || (n==8) || (n==9))
        {
            cout>>"number is right : check for other";
        }
        if()
    }
    // Return the minimum number of characters to make the password strong
}

int main() {
    int n;
    cin >> n;
    string password;
    cin >> password;
    int answer = minimumNumber(n, password);
    cout << answer << endl;
    return 0;
}