import java.util.Scanner;

public class abc091a {

  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");
  }

}
