import java.util.*;
public class Main{
  public static void main(String[]args){
      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");
      }



  }
