#include <bits/stdc++.h>
using namespace std;
double sum, n, i = 1;

int main() {
	cin >> n;
	while (sum <= n) {
		sum += 1 / i;
		if (sum > n) {
			cout << i << endl;
			break;
		}
		i++;
	}
	return 0;
}

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

int main() {
	int k, n;
	double s = 0;
	cin >> k;
	for (int i = 1; i < 100000000; i++) {
		s = s + 1.0 / i;
		if (s > k) {
			cout << i;
			break;
		}
	}
	return 0;
}