Compilare: user.cpp: In function ‘void solveLower(int)’: user.cpp:109:9: warning: variable ‘start’ set but not used [-Wunused-but-set-variable] int start, finish; ^ user.cpp: In member function ‘void inputReader::getBuffer()’: user.cpp:26:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, bufferDim, stdin); ^