import java.util.Scanner;

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();
        String ans = "No";
        if(A+B>=C) ans = "Yes";
        System.out.println(ans);
    }
}