import java.util.Scanner;

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