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