#include <stdio.h>
#include <math.h>

int main(){
	int n;
	while(scanf("%d",&n)!=EOF){
		int a[n];
		double sum=0;
		for(int i=0;i<n;i++){
			scanf("%d",&a[i]);
			double x=sqrt(a[i]);
			sum+=x;
		}
		int x=sum;
		if(x*10==sum*10){
			printf("Yes\n");
		}
		else{
			printf("No\n");
		}
	}

	return 0;
}