Solve Leetcode Problems and Get Offers From Your Dream Companies

Problem 1429. First Unique Number.

In this series, I am going to solve Leetcode medium problems live with my friend, which you can see on our youtube channel, Today we will do Problem Problem 1429. First Unique Number.

A little bit about me, I have offers from Uber India and Amazon India in the past, and I am currently working for Booking.com in Amsterdam.

Motivation to Learn Algorithms

Solve Leetcode Problems and Get Offers From Your Dream Companies

Problem Statement

You have a queue of integers, you need to retrieve the first unique integer in the queue.
Implement the FirstUnique class:

• FirstUnique(int[] nums) Initializes the object with the numbers in the queue.
• int showFirstUnique() returns the value of the first unique integer of the queue, and returns -1 if there is no such integer.
• void add(int value) insert value to the queue.