#include <stdio.h>
int main(int argc , char *argv[])
{
int year;
year=atoi(argv[1]);
if ( year%400 == 0)
printf("\n\n\t\t\t\t\t%d is a leap year.", year);
else if ( year%100 == 0)
printf("\n\n\t\t\t\t\t%d isn't a leap year.", year);
else if ( year%4 == 0 )
printf("\n\n\t\t\t\t\t%d is a leap year.", year);
else
printf("\n\n\t\t\t\t\t%d isn't a leap year.", year);
return 0;
}