include <stdio.h>

include <string.h>

int main() {

char a[10005] ;
gets(a);
int b = strlen(a);
int c = a[b - 1] - '0';
if (c % 2 == 0) {
	printf("YES");
}
if (c % 2 != 0) {
	printf("NO");
}
return 0;

}