- Extract required data from complex json response of an API based on conditions - Design a LRU cache - Program to maximize profit of a stock buy/sell (https://www.geeksforgeeks.org/stock-buy-sell/) - Questions around previous projects

Write a function that accepts an array of tickets, where ticket has format [source: string, destination: string] and returns comma separated countries in order of visiting. function getRoute(tickets){ return 'USA,BRA,UAE,JPN,PHL'; // implement logic here } const result = getRoute([['JPN', 'PHL'], ['BRA', 'UAE'], ['USA', 'BRA'], ['UAE', 'JPN']]); console.log(result); Example: Tickets: [["JPN", "PHL"], ["BRA", "UAE"], ["USA", "BRA"], ["UAE", "JPN"]] Result: "USA, BRA, UAE, JPN, PHL