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

  }
}