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.print("Yes");
        } else {
            System.out.print("No");
        }
    }
}