    import java.util.Scanner;
     
    class team_formation1_b {
      public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int m = in.nextInt();
        int c = in.nextInt();
        if ((n + m) >= c) {
          System.out.println("Yes");
        } else {
          System.out.println("No");
        }
      }
    }