culori.cpp: In constructor 'InputReader::InputReader(const char*)': culori.cpp:9: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result culori.cpp: In constructor 'InputReader::InputReader(const char*)': culori.cpp:9: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result culori.cpp: In constructor 'InputReader::InputReader(const char*)': culori.cpp:9: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result culori.cpp: In member function 'void InputReader::advance()': culori.cpp:31: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result