#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int t = sqrt(n);
    if(t == sqrt(n))
    {
        cout<<"Y";
    }
    else
    {
        cout<<"N";
    }

    return 0;
}
/**************************************************************
	Problem: 2118
	User: wuyichen
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/