
import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner stdin =new Scanner(System.in);
		int a=stdin.nextInt();
		int b=stdin.nextInt();
		int c=stdin.nextInt();

	if(a+b>=c)
		System.out.println("Yes");
	else
		System.out.println("No");
	}
}