Compilare: user.cpp: In function ‘Treap* erase(Treap*, int)’: user.cpp:154:16: warning: unused variable ‘aux’ [-Wunused-variable] Treap *aux = t; ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:17:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, in); ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:44:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, in); ^