#include<stdio.h>
int main()
{
  int yeaar=0;
  for(year=1000;year<=2000;year++)
  {
    if(year%4==0 && year%100!=0)
      printf("%d ",year);
    elae if(year%400==0)
      printf("%d ",year);
    //简单的方法if((year%4==0 && year%100!=0) || (year%400==0))
  }
  return 0;
}