#include <bits/stdc++.h>   using namespace std;   int main() {     long long n, m;     int wyn = 0;     long long a, b;     cin >> n;     a = 1;     m = 2;     while (m <= n) {       wyn++;       b = m;       m += a;       a = b;     }     cout << wyn <<   n ;   }   