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