import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner sc= new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		if(a+b>c){
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
}