View Compilation Error

0_0_39568691_3542.cpp: In function 'int main()':
0_0_39568691_3542.cpp:13:9: error: 'vector' was not declared in this scope
   13 |         vector<int> cycle;
      |         ^~~~~~
0_0_39568691_3542.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | using namespace std;
0_0_39568691_3542.cpp:13:16: error: expected primary-expression before 'int'
   13 |         vector<int> cycle;
      |                ^~~
0_0_39568691_3542.cpp:19:13: error: 'cycle' was not declared in this scope
   19 |             cycle.push_back(fn);
      |             ^~~~~
0_0_39568691_3542.cpp:25:17: error: 'cycle' was not declared in this scope
   25 |         cout << cycle[index] << endl;
      |                 ^~~~~