#include <cstdio>
#include <algorithm>

using namespace std;

long long dp[2][140000];

#define dp[0] (dp[0] + 70000)
#define dp[1] (dp[1] + 70000)

int main ()
{
    freopen ("1-sir.in", "r", stdin);
    freopen ("1-sir.out", "w", stdout);

    int n, s;
    scanf ("%d %d", &n, &s);

    if (s > n * (n + 1) / 2 || s < -n * (n + 1) / 2)
    {
        printf ("0\n");
        return 0;
    }

    for (int i = 1; i <= n; ++i)
        for

    return 0;
}