import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		if (a+b<=c){
        	System.out.print("No");
        }else{
        	System.out.print("Yes");
        }

    }
}