func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s =   ;     vector<int> fib;     fib.push_back(1);     fib.push_back(1);     for (int i = 2; i < 17; ++i) {       fib.push_back(fib[i - 1] + fib[i - 2]);     }     for (int i = 1; i <= n; ++i) {       if (binary_search(fib.begin(), fib.end(), i) == 1) {         s.append(1u,  O );       } else {         s.append(1u,  o );       }     }     cout << s <<   n ;   }   