#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, lvl = 0;
    long long int sum;
    cin >> n >> sum;
    if(n == 1)
    {   int it = 1;
        while(sum > 0)
        {
            sum -= (it * it);
            it++;
            if(sum >= 0) lvl++;
        }
    }
    else
    {
        int it = 1;
        while(sum > 0)
        {
            sum -= (it * it);
            it += 2;
            if(sum >= 0) lvl++;
        }
    }
    cout << lvl << endl;
}