Here's my submission on accuknox interview question

A restaurant keeps a log of (eater_id, foodmenu_id) for all the diners. The eater_id is a unique number for every diner and foodmenu_id is unique for every food item served on the menu.

Write a program that reads this log file and returns the top 3 menu items consumed. If you find an eater_id with the same foodmenu_id more than once then show an error.

Tip: Find the ocuurance of food items ordered and raise error if duplicay found in food items.

Using json to track food menu and eater id and check occurance, if occurance occur more than one time then raising error.

Fix: Change the globle variable list children because it's access by all node and have to init in initilazise function to access it for each node.