HDU-2092

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#include <stdio.h>int main(){int i,n,m;while(scanf("%d%d",&m,&n)&&(n||m)){  for(i=-9999;i<10000;i++)    if(i*(m-i)==n)    {printf("Yes\n"); break;}   if(i*(m-i)!=n) printf("No\n");}return 0;}