int main() {
int year;
scanf("%d", &year);
if((year%100!=0&&year%4==0)||year%400==0){
printf("YES");
}else{printf("NO");}
return 0;
}
#include <stdio.h>
int main{
int year;
for(year=2000,year<=2500,year++){
if((year%100!=0&&year%4==0)||year%400==0){
printf("YES")
}else{
printf("NO")
}
}
}