#include <bits/stdc++.h>
using namespace std;
  
int main(){
    int n;
    cin>>n;
    int x=sqrt(n);
    if(x*x==n){
        cout<<"Y";
    }else{
        cout<<"N";
    }
}
/**************************************************************
	Problem: 2118
	User: wengsihan
	Language: C++
	Result: Accepted
	Time:32 ms
	Memory:2072 kb
****************************************************************/