import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int A=scan.nextInt();
		int B=scan.nextInt();
		int C=scan.nextInt();
		if(A+B>=C)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}

	}

}
