import java.util.*;
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("Yes");
		} else {
			System.out.println("No");
		}
	}
}