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Data Structure & Algorithms

The Concepts of Data Structures and Algorithms & Coding Test Prep

Articles in this series

[Data Structure] Binary Heap

Jun 14, 20235 min read

🌲 Data Structure Overview What is ADT? ADT stands for Abstract Data Type. It is a mathematical model that defines the shape of a data structure and...

[Data Structure] Binary Heap

[Leetcode] 217. Contains Duplicate & 238. Product of Array Except Self

Apr 15, 20232 min read

04/14/23 · Contains Duplicate var containsDuplicate = function(nums) { let originalLen = nums.length; let newNumsLen = [...new...

[Leetcode] 217. Contains Duplicate & 238. Product of Array Except Self

[Leetcode] 121. Best Time to Buy and Sell Stock

Apr 13, 20232 min read

Blind 75 Array 2 · 121. Best Time to Buy and Sell Stock My Solution Firstly, I used the two-pointer approach again. (Maybe I got obsessed with this...

[Leetcode] 121. Best Time to Buy and Sell Stock

[Leetcode] 1. Two Sum

Apr 13, 20233 min read

Blind 75 Array 1 · Leetcode 1. Two Sum Problem My Answer var twoSum = function(nums, target) { let [start_pntr, end_pntr, maxIdx] = [0, 1,...

[Leetcode] 1. Two Sum

[Data Structure] Hash Table

Mar 11, 20232 min read

Hash Table ADT Data Structure Mapping keys with values Most of the operations are O(1) => good performance Hash function Mapping the...

[Data Structure] Hash Table

[Data Structure] Stack, Queue

Mar 11, 20232 min read

Stack class Node: def __init__(self, item, next): self.item = item self.next = next class Stack: def __init__(self): ...

[Data Structure] Stack, Queue