1 long long f(long long x)2 f (long long x) 3 { 4 return x / 10000000000LL; 5 } 6 main()7 main () 8 { 9 if (f (10000000000LL) != 1 || f (100000000000LL) != 10) 10 abort (); 11 exit (0); 12 } 13