#include <iostream> using namespace std; double hi(int n) { double sum = 0.0; for (int i = 1; i <= n;i++) { sum += 1.0 / i; } return sum; } int main() { int k; cin >> k; int n = 1; double sum = 0.0; while (sum <= k) { sum = hi(n); ++n; } cout << n -1 << endl; return 0; }