#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

void solve() {
  boost::multiprecision::cpp_int n, a = 0, b = 1, c = 0;
  cin >> n;
  for (ll k = 1;; k++) {
    if (b % n == 0) {
      cout << k << '\n';
      return;
    }
    c = a + b;
    a = b;
    b = c;
  }
}

int main() {
  std::cin.tie(nullptr);
  std::ios_base::sync_with_stdio(false);
  int T = 1;
  for (int t = 0; t < T; t++) {
    solve();
  }
  return 0;
}