#include <iostream>
#include <bits/stdc++.h>

using namespace std;

int main() {
    long long a, b;
    cin >> a >> b;

    long long s = a + 2 * b;
    if (s < 4){
        if (s == 1) cout << 4;
        else if (s == 2) cout << 6;
        else if (s == 3) cout << 8;
        return 0;
    }
    long long tmp = int(sqrt(s));

    s -= tmp * tmp;

    if (s != 0) cout << 2 * (tmp + tmp + (s / tmp) + 1);
    else cout << 4 * tmp;
    return 0;
}