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

using i32 = int;
using i64 = long long;
#define int i64

signed main() {
    int x;
    cin >> x;
    if (x == 0) {
        cout << "Yes" << endl;
        return 0;
    }
    cout << "No" << endl;
    return 0;
}