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");
	}
	}
}