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