import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		final int M = sc.nextInt();
		final int X = sc.nextInt();
		
		System.out.println(X - (N - M) >= 3 ? "YES" : "NO");
	}
}