import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int m = sc.nextInt();
		int x = sc.nextInt();
		
		if (x - (n - m) >= 3) {
			System.out.println("YES");
		} else {
			System.out.println("NO");
		}
	}

}