import java.util.Scanner;

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();
		if(A+B>=C){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
		
		sc.close();
	}
}
