#include <iostream>
#include <cmath>
#include <fstream>

using namespace std;

ifstream in("1-sir.in");
ofstream out("1-sir.out");

const int dim = 260;
const int dim2 = dim*(dim+1)/2;

int n,s,dp[2][dim2];

int main()
{
    int i,j,val,val2;
    in >> n >> s;
    s = abs(s);
    if (s > n*(n-1)/2)
    {
        out << "0";
        return 0;
    }
    dp[1][0] = 1;
    for (i=2; i<=n; i++)
    {
        for (j=0; j<=i*(i-1)/2; j++)
        {
            val = abs(j-i+1);
            val2 = min(j+i-1 , dim*(dim-1)/2-1);
            dp[i&1][j] = dp[1-(i&1)][val] + dp[1 - (i&1)][val2];
        }
    }
    out << dp[n&1][s];
    return 0;
}