import java.util.*;

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