import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);
		int A = scan.nextInt();
		int B = scan.nextInt();
		int C = scan.nextInt();

		if (C <= (A + B)) {
			System.out.print("Yes");
		} else {
			System.out.print("No");
		}

	}

}
