#include <iostream>
#include <stdlib.h>
#include <fstream>

using namespace std;

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

int main()
{
    int dp[257][100];
    int n, s;

    in >> n >> s;

    int k = n * (n + 1) / 2;
    if(s > k){
        out << 0;
        return 0;
    }
    dp[1][0] = 1;
    dp[0][0] = 1;
    for(int i = 1; i <= n ; i ++)
        for(int j = 1; j <= i*(i-1)/2 ; j ++){
            int x = abs(j - (i - 1));
            int y = abs(j + (i - 1));
            dp[i][j] = dp[i - 1][x] + dp[i - 1][y];
        }

    cout << dp[n][s];
}