import java.util.*;

class Main {
   public static void main(String[] args)
   {
      Scanner scan = new Scanner(System.in);
    
      int A=can.nextInt();
      int B=scan.nextInt();
      int C=scan.nextInt();

      if(A+B>=C){
        System.out.println("Yes");
      }else(A+B<C){
        System.out.println("No");
      }
   }
}
