import java.util.Scanner;

public class Main {
    public static void main(String args[]) {
        try (Scanner in = new Scanner(System.in)) {
            int A = in.nextInt();
            int B = in.nextInt();
            int C = in.nextInt();
            System.out.println(A + B >= C ? "Yes" : "No");
        }
    }
}
