C++ Error: Conflicting Declaration of 'free_int' Variable

The error is occurring because you are trying to declare a variable named 'free_int' twice in the same scope.

In the code you provided, you have already declared 'free_int' as an int64_t type variable at the beginning of your code. However, at line 42, you are trying to declare it again as an int type variable.

To fix this error, you should remove the conflicting declaration at line 42 or give it a different name.