#include<bits/stdc++.h>
using namespace std;
const int MOD = 998244353;
int main() {
  int N;
  cin >> N;
  if (N == 1) {
    cout << 1 << endl;
    return 0;
  }
  vector<long long> F = {1, 1};
  int i = 2;
  while (1) {
    F.push_back((F[i - 2] + F[i - 1]) % N);
    if (F[i] % N == 0) {
      break;
    }
    i++;
  }
  cout << i + 1 << endl;
}