import java.util.*;
class Test36{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int count1 = 0;
		int count2 = 0;
		int d = a;
		
		while(a>0){
			a -= b;
			count1++;
		}
		
		while(d>0){
			d -= c;
			count2++;
			
		}
		
		if(count2>=(count1*(2/3))){
			System.out.println("YES");
		}else{
			System.out.println("NO");
		}
	}
}