#include <bits/stdc++.h>
using namespace std;
int main(){
   int n;
   cin>>n;
   int x=sqrt(n);
	if (x*x==n){
   cout<<"Y"<<endl;
   } 
   else {
   	cout<<"N"<<endl;
   }
}
/**************************************************************
	Problem: 2118
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/