Mã chấm: 556905

Main.cc: In function ‘int main()’:
Main.cc:7:5: error: ‘FileIO’ was not declared in this scope; did you mean ‘fileno’?
    7 |     FileIO();
      |     ^~~~~~
      |     fileno
Main.cc:23:23: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   23 |     for (int i = 0; i < A.size(); i++) {
      |                     ~~^~~~~~~~~~
Main.cc:24:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   24 |         for (int j = 0; j < B.size(); j++) {
      |                         ~~^~~~~~~~~~