#include<bits/stdc++.h>
using namespace std;
int a,b,n;
int main(){
	ios::sync_with_stdio(0);
	cin>>n;
	while(n--){
		cin>>a>>b;
		if(int(sqrt(b))*int(sqrt(b))==b) cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
	return 0;
}