Compilare: user.cpp: In function ‘int ExtraWeightRemoveColumn(const std::vector<std::vector<short int> >&, const std::vector<SumEntry>&, const std::vector<SumEntry>&, int, int)’: user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < newRows.size(); i++) ^ user.cpp: In function ‘void RemoveColumn(const std::vector<std::vector<short int> >&, std::vector<SumEntry>&, std::vector<SumEntry>&, int)’: user.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < rows.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:85:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < columnSum.size(); j++) ^ user.cpp:64:6: warning: unused variable ‘columnsFound’ [-Wunused-variable] int columnsFound = 0; ^ user.cpp:65:6: warning: unused variable ‘rowsFound’ [-Wunused-variable] int rowsFound = 0; ^