#include<fstream.h>
#define abs(x) ( x < 0 ? -x : x )

int main()
{

int n;
long long S;


ifstream f("1-sir.in");
f>>n>>S;
f.close();

ofstream g("1-sir.out");

if( abs(S) > (n-1)*n/2 ) {  g<<"0\n";g.close(); return 0; }

if( abs(S) == (n-1)*n/2 ){  g<<"1\n";g.close(); return 0; }




return 0 ;
 }