Compilare: user.cpp: In function ‘void parc(int)’: user.cpp:64:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, j = nr % cycle.size(); i < cycle.size(); ++ i, j = ((j + 1 == cycle.size()) ? 0 : j + 1)) ^ user.cpp:64:94: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, j = nr % cycle.size(); i < cycle.size(); ++ i, j = ((j + 1 == cycle.size()) ? 0 : j + 1)) ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:13:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:35:51: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^