Series

LeetCode Challenge

In this series, I will tackle LeetCode challenges with varying difficulties. I will share my thought process to my solution and how I ended up solving the problem.

Articles in this series

LeetCode Challenge #1: Kids With the Greatest Number of Candies

May 20, 2020

Problem statement: Given the array candies and the integer extraCandies, where candies[i] represents the number of candies that the ith kid has. For...

LeetCode Challenge #1: Kids With the Greatest Number of Candies

LeetCode Challenge #2: Number of Steps to Reduce a Number to Zero

May 21, 2020

Problem statement: Given a non-negative integer num, return the number of steps to reduce it to zero. If the current number is even, you have to...

LeetCode Challenge #2: Number of Steps to Reduce a Number to Zero

LeetCode Challenge #3: Jewels and Stones

May 22, 2020

Problem Statement You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in...

LeetCode Challenge #3: Jewels and Stones

LeetCode Challenge #4: How Many Numbers Are Smaller Than the Current Number

May 23, 2020

Problem statement: Given the array nums, for each nums[i] find out how many numbers in the array are smaller than it. That is, for each nums[i] you...

LeetCode Challenge #4: How Many Numbers Are Smaller Than the Current Number

LeetCode Challenge #5: Defanging an IP Address

May 28, 2020

Problem Statement Given a valid (IPv4) IP address, return a defanged version of that IP address. A defanged IP address replaces every period "." with...

LeetCode Challenge #5: Defanging an IP Address

LeetCode Challenge #6: Decompress Run-Length Encoded List

May 31, 2020

Writer's note: Found this draft sitting too long in Drafts. Lost the timing to publish in May so backdated it to May but published in July. Problem...

LeetCode Challenge #6: Decompress Run-Length Encoded List