#include <bits/stdc++.h>
using namespace std;

bool judge(int x){
    int y=x*x;
    int size=1;
    int t=x;
    while(x!=0){
        size*=10;
        x/=10;
    }
    y%=size;
    return t==y;
}

int main() {
	int x;
	while(cin>>x){
	    if(judge(x))cout<<"Yes!"<<endl;
	    else cout<<"No!"<<endl;
	}

}