#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  if (n == 1) {
    cout << 1 << endl;
    return 0;
  }
  vector<int> fib(2, 1);
  for (int i = 2;; i++) {
    int nxt = (fib[i - 1] + fib[i - 2]) % n;
    if (nxt == 0) {
      cout << fib.size() + 1 << endl;
      return 0;
    }
    fib.push_back(nxt);
  }
  return 0;
}