#include <bits/stdc++.h>

#include <atcoder/all>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define FAST_IO                \
  ios::sync_with_stdio(false); \
  cin.tie(0);
const i64 INF = 1001001001001001001;
using Modint = atcoder::static_modint<998244353>;

int main() {
  FAST_IO
  auto ans = 0LL;

  int N;
  cin >> N;

  if (N == 1) {
    cout << 1 << endl;
    return 0;
  }

  i64 x = -1;

  vector<i64> f(N + 1);
  f[1] = 1;
  f[2] = 1;

  for (int i = 3; i <= 10000; i ++) {
    f[i] = f[i - 1] + f[i - 2];
    f[i] %= N;

    if (f[i] == 0) {
      if (x < 0) {
        x = i;
      } else {
        x = gcd(x, i);
      }
    }
  }



  cout << x << endl;
}