func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int ans = 0;     long long p = 1, q = 2, r, n;     cin >> n;     while (q <= n) {       ans++;       r = q;       q = p + q;       p = r;     }     printf( %d n , ans);     return 0;   }   