import java.io.*;
import java.util.*;

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();
		System.out.println(a+b>=c?"Yes":"No");
	
	
	
	}
}