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#include<stdio.h>
int main() {
	int i,j,n,m;
	int x;
	while(scanf("%d %d",&n,&m),n!=0||m!=0) {
		for(i=-100,x=0; i<100; i++) {
			if((n-i)*i==m) {
				x=1;
				break;
			}
		}
		if(x==1)
			printf("Yes\n");
		else
			printf("No\n");
	}
	return 0;
}