import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A, B, C;
		A = sc.nextInt();
		B = sc.nextInt();
		C = sc.nextInt();
		if (A + B < C) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	}

}
