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

}