import java.util.*;
public class Main {
	public static void main(String[] args){
    //データ取り込み
		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");
		}
	}
}