Compilare: user.cpp: In function ‘void bfs()’: user.cpp:53:14: warning: unused variable ‘vecin’ [-Wunused-variable] int nod, vecin; ^~~~~ user.cpp: In member function ‘void InputReader::adv()’: user.cpp:23:54: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, sizeof(char), BUFF_SIZE, fin); ^