hhhhhhhhhhh

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

int main() {
    int n;
    cin >> n;

    if (n <= 1) {
        cout << "No";
        return 0;
    }

    if (n == 2 || n == 3) {
        cout << "Yes";
        return 0;
    }

    if (n % 2 == 0 || n % 3 == 0) {
        cout << "No";
        return 0;
    }

    int sqrt_n = sqrt(n);
    for (int i = 5; i * i <= n; i += 6) {
        if (n % i == 0 || n % (i + 2) == 0) {
            cout << "No";
            return 0;
        }
    }

    cout << "Yes";
    return 0;
}