#include "time.h"
  

  

  clock_t beg, end;
  

  beg = clock();
  

  int cnt = 0;
  

  for(; cnt < 1000000000; ) ++cnt;
  

  end = clock();
  

  printf("%f",(double)(end - beg));
  

  

  

  

  

  

  2657.000000