#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: linmiaoling
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/