View Compilation Error

0_0_32220918_18833.cpp: In function 'int main()':
0_0_32220918_18833.cpp:44:7: error: request for member 'clear' in 'son', which is of non-class type 'std::vector<int> [6004]'
   son.clear();
       ^
0_0_32220918_18833.cpp:45:6: error: request for member 'clear' in 'fa', which is of non-class type 'std::vector<int> [6004]'
   fa.clear();
      ^