#include <iostream>
using namespace std;

bool prime (int n) {
    if (n < 2) return false;
    for (int d = 2; d * d <= n; d++) {
        if (n % d == 0) {
            return false;
        }
    }
    return true;
}

int main () {
    int k;
    while (cin >> k) {
        cout << prime (k) << endl;
    }
    return 0;
}