Compilare: user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:21:37: 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:43:38: 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 ‘void solve(int, int)’: user.cpp:73:25: warning: ‘posMax’ may be used uninitialized in this function [-Wmaybe-uninitialized] solve(posMax + 1, right); ^