using namespace std;
#include<stdio.h>
#include<fstream>
#define cst 194767

char sol[33000];

int main()
{
int n,s,i;

FILE *fin=fopen("1-sir.in","r"),
     *fout=fopen("1-sir.out","w");
     
fscanf(fin,"%d%d",&n,&s);
if(s<0) s=-s;

//preprocesarea
memset(sol,0,sizeof sol);
for(i=1;i<=255;i++)
   sol[i*(i+1)/2]=1;


if(sol[s]==0)
   fprintf(fout,"0\n");
else
  {
  
                       
  }


fclose(fin);
fclose(fout);
return 0;
}