#include <bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
const int64_t mod = 1e9 + 7;

int main() {
	int64_t p;
	cin >> p;

	int64_t n = 1;
	for (int64_t i = 0; i < p; i++) {
		n *= 2;
	}
	n--;
	//cout << n << endl;

	int64_t sum = 0;
	while (1) {
		sum += n % 2;
		n /= 2;

		if (n < 2) {
			sum++;
			break;
		}
	}

	cout << p << endl;
}