import java.util.Scanner;



public class Main{
    public static void main(String[] args){
        final 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");
    }
}
