import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		int a, b, c;
		Scanner sc = new Scanner(System.in);
		a = sc.nextInt();
		b = sc.nextInt();
		c = sc.nextInt();
		System.out.println(a + b >= c ? "Yes" : "No");
	}
}
