70 Leetcode problems in 5+ hours (every data structure) (full tutorial)

In this video we go through the solution and problem solving logic, walking through pretty much every leetcode question you need to know to pass a tech/programming interview, or to just become a better software engineer.

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📕 Chapters:
0:00:00 Intro
0:00:40 Steps to get Hired into Tech
0:05:39 Big O Notation
0:11:57 Problem Solving Techniques
0:15:04 SECTION - ARRAYS: Contains Duplicate
0:16:51 Missing Number
0:19:36 Note: Sorting, Dictionary, Lambdas
0:20:09 Find All Numbers Disappeared in an Array
0:23:19 Two Sum
0:28:32 Note: Java vs Python - Final Value After Operations
0:30:08 How Many Numbers Are Smaller Than the Current Number
0:34:29 Minimum Time Visiting All Points
0:39:12 Spiral Matrix
0:44:40 Number of Islands
0:54:50 SECTION - ARRAYS TWO POINTERS: Best Time to Buy and Sell Stock
1:00:42 Squares of a Sorted Array
1:12:20 3Sum
1:21:06 Longest Mountain in Array
1:25:38 SECTION - ARRAYS SLIDING WINDOW: Contains Duplicate II
1:29:57 Minimum Absolute Difference
1:33:19 Minimum Size Subarray Sum
1:38:36 SECTION - BIT MANIPULATION: Single Number
1:44:09 SECTION - DYNAMIC PROGRAMMING: Coin Change
1:56:11 Climbing Stairs
1:59:33 Maximum Subarray
2:02:39 Counting Bits
2:11:28 Range Sum Query - Immutable
2:14:50 SECTION - BACKTRACKING: Letter Case Permutation
2:20:43 Subsets
2:28:22 Combinations
2:34:42 Permutations
2:41:54 SECTION - LINKED LISTS: Middle of Linked List
2:43:58 Linked List Cycle
2:46:24 Reverse Linked List
2:49:39 Remove Linked List Elements
2:54:42 Reverse Linked List II
3:01:25 Palindrome Linked List
3:06:01 Merge Two Sorted Lists
3:10:11 SECTION - STACKS: Min Stack
3:15:22 Valid Parentheses
3:19:53 Evaluate Reverse Polish Notation
3:25:53 Stack Sorting
3:31:03 SECTION - QUEUES: Implement Stack using Queues
3:34:35 Time Needed to Buy Tickets
3:38:05 Reverse the First K Elements of a Queue
3:40:45 SECTION - BINARY TREES: Average of Levels in Binary Tree
3:45:14 Minimum Depth of Binary Tree
3:47:24 Maximum Depth of Binary Tree
3:50:21 Min/Max Value Binary Tree
3:51:31 Binary Tree Level Order Traversal
3:53:57 Same Tree
3:57:34 Path Sum
4:01:30 Diameter of a Binary Tree
4:07:19 Invert Binary Tree
4:09:18 Lowest Common Ancestor of a Binary Tree
4:17:25 SECTION - BINARY SEARCH TREES: Search in a Binary Search Tree
4:19:11 Insert into a Binary Search Tree
4:21:06 Convert Sorted Array to Binary Search Tree
4:26:24 Two Sum IV - Input is a BST
4:28:02 Lowest Common Ancestor of a Binary Search Tree
4:30:01 Minimum Absolute Difference in BST
4:34:01 Balance a Binary Search Tree
4:35:52 Delete Node in a BST
4:41:27 Kth Smallest Element in a BST
4:43:37 SECTION - HEAPS: Kth Largest Element in an Array
4:52:44 K Closest Points to Origin
4:56:30 Top K Frequent Elements
4:59:06 Task Scheduler
5:05:05 SECTION - GRAPHS: Breadth and Depth First Traversal
5:06:13 Clone Graph
5:12:51 Core Graph Operations
5:14:02 Cheapest Flights Within K Stops
5:20:42 Course Schedule
5:26:43 Outro

[Ritav-fe]

bro opens an account and immediately posts a banger

[shiro-cs]

Took me a little over one month to complete all 70 problems. Thanks for making this list!

[sushmithar]

when you say things like 'if you don't know this(i'm expecting you to say 'you should learn a little bit of dsa before you continue with this video' but you say).... it's okay its expected at this point' I feel so good... and safe to learn from you and do not regret clicking on this video. Ik it sounds dramatic, but I'm sure a lot of people feel this way.

[femmeflairs]

usually don't comment, but this is peak youtube education... every other creator is monetizing off of their resources for learning data structures (even leetcode w/ their premium :/) but this is ironically by far one of the most valuable video out here that could easily beat any paid course 🤣 THANK YOU, this deserves millions of views.

[lukavarsimashvili]

just watched 1 hour and already want to say, its very helpful, thank you!

[hassansyed]

Stoney,
Thanks for doing this for complete strangers on Youtube
You a real one.

[kidyoshi]

Bro saved my life...
i have a good resume and everything, but need to work on leetcode'ing and applying to companies,
with this, all i need know is practice, applying, and luck.
Thank you so much bro. Real one

[Vinayaka-Iyer]

Hi stoney, just wanted to thank you for posting this absolute gem of a video. It took me 18 days but I have successfully completed all the problems in this video and I do hope there is a part 2 if posssible. I'll take the next week to redo some of the questions I found hard the first time around. Once again thanks a lot for the awesome video!!!

[mustafa]

I've been chosen by the algorithm 🙏

[tommyshelby]

comes to youtube
drops a banger
refuses to explain
leaves~ CHAD

[theaakashd]

Ohh my god this is exactly what i was needed right now

[Vuden]

I passed a technical interview thanks this video 😭🙏🙏

[lazarus]

This video is my interruption lol

But this is almost on the level of integrating 200 times straight in the math youtube world. Massive props

[jkllkey]

Thankyou man. Liked, commented and subscribed . This one needs to reach a lot more people preparing . You are a saviour.

[sweetmelonmochi_x]

Such a fantastic easy to follow video, I like how you break down complex ideas into easy to understand statements, thank you so much

[Jawsh.official]

Best video ive come across. Thank you. Ill be joining the patreon tmr

[amalnasir]

I like it when I see people understand what you need and try to make things easier for you. I haven’t watched the video yet but I am sure it will be a great help for my preparation. Thank you sir!

[iNesteroff]

bro, u made content for ages! insane work, well done!

[swayamsingh]

hey! stoney would love if you make more videos like this, never saw a great explainer like you!

[harshmalik]

This video and the channel deserve a million views. Absolute banger!!