#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	double r=sqrt(n);
	if(r==int(r))
	{
		cout<<"Y";
	} 
	else
	{
		cout<<"N";
	}
	return 0;
}
/**************************************************************
	Problem: 2118
	User: wangyuxin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/