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 = "";

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