#include <stdio.h>

int main(void){
	int a,b,c;
	
	int l,r;
	scanf("%d", &a);
	scanf("%d", &b);
	scanf("%d", &c);
	
	l = a/b + ((a%b != 0)? 1:0);
	r = a/c + ((a%c != 0)? 1:0);
	
	if( (l * 2) >= (r * 3)){
		printf("YES\n");
	}else{
		printf("NO\n");
	}
	return 0;
}