import java.util.*;

public class BC91_A{
	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");
		}
	}
}