//acmp.ru 0907 mouse.cpp 9%

#include <stdio.h>

int main(){
	freopen("INPUT.TXT", "r", stdin);
	freopen("OUTPUT.TXT", "w", stdout);

	int w,h,r;
	scanf("%i %i %i", &w, &h, &r);
	r = r*2;
	if(r <= w && r <= h){
		printf("YES");
	}else{
		printf("NO");
	}
}