Compilare: user.c: In function ‘main’: user.c:30:2: warning: unknown conversion type character 0xa in format [-Wformat=] fprintf(fout, "%ll\n", res); ^ user.c:30:2: warning: too many arguments for format [-Wformat-extra-args] user.c:23:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d\n", &n); ^