Compilare: user.cpp: In function ‘void Read()’: user.cpp:73:18: warning: statement has no effect [-Wunused-value] a1[i].poz; ^ user.cpp: In function ‘void Solve()’: user.cpp:93:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok; ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:15:47: 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:37:51: 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); ^