杭电2092

#include<stdio.h>
int main()
{
    int n,m,i,j,x;
    while(~scanf("%d%d",&n,&m)&&(n||m))
    {
        x=m<0?-m:m;
        for(i=1; i*i<=x; ++i)
        {
            if(x%i)
                continue;
            else
                j=m/i;
            //printf("i-j=%d,j-i=%d\n",i-j,j-i);
            if(m)
            {
                if(i+j==n||-i-j==n)
                    break;
            }
            else if(i-j==n||j-i==n)
                break;
        }
        if(i*i>x)
            printf("No\n");
        else
            printf("Yes\n");
    }
}