#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
#include<map>
using namespace std;
int main() {
    double n;
    while (cin >> n) {
        int a = n;
        if (n - a == 0) {
            cout << "Yes" << endl;
        }
        else {
            cout << "No" << endl;
        }
    }
    return 0;
}