import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		
		int a = stdIn.nextInt();
		int b = stdIn.nextInt();
		int c = stdIn.nextInt();
		
		int d = a + b;
		
		if (d > c) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}