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