Compilare: user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:19:37: 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:41:38: 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 function ‘int main()’: user.cpp:137:43: warning: ‘EMIN’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << SOL << ' ' << RMIN << ' ' << EMIN; ^ user.cpp:137:24: warning: ‘RMIN’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << SOL << ' ' << RMIN << ' ' << EMIN; ^