#include <stdio.h>
int main()
{
  int year,leap;
  printf("enter year:");
  scanf("%d",&year);
  if((year%4==0 && year%100!=0) || (year%400==0))
     leap=1;
  else
     leap=0;
  if (leap)
     printf("%d is ",year);
  else
     printf("%d is not ",year);
  printf("a leap year.\n");
  return 0;
}