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