#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> P;
int INF = 3e18;
int mod = 1e9+7;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
signed main() {
    int A;
    cin >> A;
    if(A%2 == 1) {
        cout << "YES" << endl;
    }
    else {
        for(int i = 2; i*i <= A; i++) {
            if(A%i == 0 && (i%2 == 1 || (A/i)%2 == 1)) {
                cout << "YES" << endl;
                return 0;
            }
        }
        cout << "NO" << endl;
    }
}