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");
      }
    }
}