Compilare: user.cpp: In function ‘int main()’: user.cpp:81:62: warning: too many arguments for format [-Wformat-extra-args] for(i = 1; i <= q; ++i) printf("%d\n", ans[M[qr[i]]], ofile); ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:19:43: 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:46:47: 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); ^