#include <stdio.h>
using namespace std;
int main()
{
 long S;
 int n;
 freopen("1-sir.in","r",stdin);
 freopen("1-sir.out","w",stdout);
 scanf("%d %ld",&n,&S);
 if (S>(n*(n+1))/2||S<-(n*(n+1))/2)
  printf("0\n");
 else
 {
  int x=S%4;
  if (x==0||x==1)
   if (S%2==1)
    printf("0\n");
  if (x==2||x==3)
   if (S%2==0)
    printf("0\n");
 }
 return 0;
}