#include <stdio.h>

int main(){
	double all,normal,campaign;
	scanf("%ld%ld%ld",&all,&normal,&campaign);
	
	double sum1 = 0;
	double normalcount = 0; 
	while(sum1 < all){
		sum1 += normal;
		normalcount++;
	}
	
	double sum2 = 0;
	double campaigncount = 0;
	while(sum2 < all){
		sum2 += campaign;
		campaigncount++;
	}
	
	if(normalcount / campaigncount >= (normalcount / 3) * 2){
		printf("YES");
	}else{
		printf("NO");
	}
}