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

void solve(){
    float a;
    cin >> a;
    if(sin(a) == 0.0 || abs(sin(a)) == 1.0){
        cout << "Yes" << endl;
    } else{
        cout << "No";
    }
    return;
}

int main(){
    solve();
    return 0;
}