Strong Password

#include <bits/stdc++.h>

using namespace std;

// Complete the minimumNumber function below.
int minimumNumber(int n, string password) {
    int con = 0;
    //bool digit = false, low = false, upp = false, spec = false;
    bool a[4] = {false};
    
    for(int i = 0; i < n; i++){
        if(password[i] >= 'A' && password[i] <= 'Z')
            a[2] = true;
        else if(password[i] >= 'a' && password[i] <= 'z')
            a[1] = true;
        else if(password[i] >= '0' && password[i] <= '9')
            a[0] = true;
        else
            a[3] = true;
    }
    for(int i = 0; i < 4; i++)
        if(!a[i])
            con++;
    
    return max(con, 6 - n);
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    int n;
    cin >> n;
    cin.ignore(numeric_limits<streamsize>::max(), '\n');

    string password;
    getline(cin, password);

    int answer = minimumNumber(n, password);

    fout << answer << "\n";

    fout.close();

    return 0;
}