Coding Fluency Metric

Table of Contents

Problems attempted so far

Problem Attempts Best Time Last Tried Difficulty Tags Status
https://leetcode.com/problems/subsets 4 3 min 14 seconds 02/17/2022 Medium LC78,recursion, IK, combination Good Job Suresh!
https://leetcode.com/problems/subsets-ii 4 13 min 47 seconds 02/17/2022 Medium LC90, recursion, combination Made one mistake in counting the duplicate values. Focus on edge case
https://www.interviewkickstart.com/problems/palindrome-partitioning 2 23 min 02/10/2022 Medium IK01,recursion, combination Needs lots of Practice
https://leetcode.com/problems/generate-parentheses 1 30 min 02/19/2022 Medium LC22, recursion, combination, backtracking Needs lots of Practice
https://leetcode.com/problems/two-sum 3 3 min 01/10/2022 Easy LC1,arrays, hashmap Needs Practice...because I made a syntax error
https://leetcode.com/problems/two-sum-ii-input-array-is-sorted 3 4 min 13 seconds 02/20/2022 Medium LC167, arrays, two pointer Got it right without any mistakes in one shot
https://leetcode.com/problems/concatenation-of-array 3 2 min 01/10/2022 Easy LC1929, arrays Needs Practice
https://leetcode.com/problems/remove-duplicates-from-sorted-array 2 6 min 12/13/2021 Easy LC26, arrays, two pointer Transform and conquer. Data is shuffled in-place in the array.
https://leetcode.com/problems/contains-duplicate 1 5 min 02/17/2022 Easy LC217, arrays Made a silly error of storing index instead of value in the dicitionary. I got this right earlier.
https://leetcode.com/problems/contains-duplicate-ii 2 15 min 12/24/2021 Easy LC219, arrays Needs Practice
https://leetcode.com/problems/read-n-characters-given-read4 1 25 min 11/10/2021 Easy LC157, arrays Understand the question and build coding fluency
https://leetcode.com/problems/mergesort 3 5 min 02/22/2022 Medium IK02, arrays, divide and conquer, sort I had to look up the base case.
https://leetcode.com/problems/n-th-tribonacci-number 2 5 min 02/18/2022 Easy LC1137, DP Made 2 mistakes before getting it right..incorrect ordering of assignment and syntax error
https://leetcode.com/problems/climbing-stairs 3 2 min 01/17/2022 Easy LC70, DP Needs Practice
https://leetcode.com/problems/best-time-to-buy-and-sell-stock 1 12 min 01/16/2022 Easy LC121, arrays Find maximum difference for max profit and the second number should be greater than the first one
https://leetcode.com/problems/intersection-of-three-sorted-arrays 1 18 min 01/10/2022 Easy LC1213,arrays, sorting Needs Practice
https://leetcode.com/problems/fibonacci-number 1 18 min 12/06/2021 Easy LC509, IK, DP Needs Practice
https://leetcode.com/problems/min-cost-climbing-stairs 1 20 min 01/17/2022 Easy LC746, DP Needs Practice
https://leetcode.com/problems/find-all-duplicates-in-an-array 1 20 min 01/17/2022 Medium LC442, arrays, Sorting Since numbers repeat once or twice, apply transform and conquer approach
https://leetcode.com/problems/permutations 1 4 min 02/19/2022 Medium LC46, recursion, IK, permutation
https://leetcode.com/problems/letter-case-permutation 3 4 min 02/01/2022 Medium LC784, recursion, combination Needs Practice
https://leetcode.com/problems/letter-combinations-of-a-phone-number 3 4 min 02/01/2022 Medium LC17, recursion, combination Needs Practice
https://leetcode.com/problems/targetsumIK 1 10 min 12/09/2021 Medium IK03, recursion, combination Needs Practice
https://leetcode.com/problems/sort-colors 2 07 min 02/22/2022 Medium LC75,arrays, IK, sorting, three pointer Needs Practice. Understand the concept
https://leetcode.com/problems/merge-sorted-array 4 7 min 02/22/2022 Easy LC88, arrays, IK, Sorting, Two pointer Combine from the back
https://leetcode.com/problems/boats-to-save-people 3 2 min 11/10/2021 Medium LC881, arrays, Two pointer Needs Practice
https://leetcode.com/problems/combinations 2 5 min 02/17/2022 Medium LC77, recursion, combination 2 Coding errors. Require Practice
https://leetcode.com/problems/running-sum-of-1d-array 2 1 min 02/17/2022 Easy LC1480,arrays, one pointer Confident
https://leetcode.com/problems/binary-trees-level-order-traversal 2 2 min 31 seconds 02/28/2022 Medium LC102, trees, IK, bfs Needs Practice
https://leetcode.com/problems/binary-trees-level-order-traversal-ii 2 3 min 24 seconds 02/28/2022 Medium LC107, trees, IK, bfs One mistake on reversing final result array
https://leetcode.com/problems/binary-trees-right-side-view 1 5 min 36 seconds 02/23/2022 Medium LC199, trees, IK, bfs Needs Practice
https://leetcode.com/problems/binary-trees-zigzag-level-order-traversal 3 11 min 03 seconds 02/28/2022 Medium LC103, trees, IK, bfs Made one mistake in declaring right_to_left flag. It should be outside all loops
https://leetcode.com/problems/n-ary-trees-level-order-traversal 3 2 min 04 seconds 02/28/2022 Medium LC429, trees, IK, bfs No mistake
https://leetcode.com/problems/path-sum 1 15 min 02/23/2022 Easy LC112, trees, IK, dfs (top down) Needs Practice
https://leetcode.com/problems/path-sum-ii 2 11 Min 54 seconds 03/04/2022 Medium LC113, trees, IK, dfs (top down) IK error case requires returning [[-1]] and IK uses node.value and LC uses node.val. By habit I type node.val instead of paying attention to the question.
https://leetcode.com/problems/diameter-of-binary-trees 2 09 min 40 seconds 03/04/2022 Easy LC543, trees, IK, dfs (bottom up) Needs Practice. Made multiple logical and syntax errors
https://leetcode.com/problems/count-univalue-subtreess 1 15 min 02/25/2022 Medium LC250, trees, IK, dfs (bottom up) Needs Practice
https://leetcode.com/problems/convert-sorted-array-to-binary-search-trees 1 06 min 15 seconds 02/25/2022 Easy LC108,trees, IK, bst, dfs (construction) Needs Practice
https://leetcode.com/problems/construct-binary-trees-from-preorder-and-inorder-traversal 1 06 min 15 seconds 02/25/2022 Medium LC105,trees, IK, dfs (construction) Needs Practice
https://leetcode.com/problems/average-of-levels-in-binary-trees 1 04 min 10 seconds 02/28/2022 Easy LC637,trees, IK, bfs Got right first time
https://leetcode.com/problems/find-largest-value-in-each-trees-row 1 04 min 42 seconds 02/28/2022 Medium LC515,trees, IK, bfs Got right first time
https://leetcode.com/problems/minimum-depth-of-binary-trees 1 06 min 33 seconds 02/28/2022 Easy LC111,trees, IK, bfs Got right first time
https://leetcode.com/problems/maximum-depth-of-binary-trees 1 04 min 10 seconds 03/01/2022 Easy LC104,trees, IK, bfs Got right first time
https://leetcode.com/problems/maximum-level-sum-of-a-binary-trees 1 10 min 53 seconds 03/01/2022 Medium LC1161,trees, IK, bfs Needs practice
https://leetcode.com/problems/univalued-binary-trees 1 05 min 10 seconds 03/01/2022 Easy LC965,trees, IK, bfs Got right first time
https://leetcode.com/problems/validate-binary-search-trees 1 05 min 10 seconds 02/28/2022 Medium LC98,trees, IK, bfs Needs lots of practice. Think successor and predecessor
https://leetcode.com/problems/cousins-in-binary-tree 1 05 min 10 seconds 03/02/2022 Easy LC993,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/populating-next-right-pointers-in-each-node 1 05 min 10 seconds 03/02/2022 Medium LC116,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/add-one-row-to-tree 1 05 min 10 seconds 03/02/2022 Medium LC623,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/maximum-width-of-binary-tree 1 05 min 10 seconds 03/02/2022 Medium LC662,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/check-completeness-of-a-binary-tree 1 05 min 10 seconds 03/02/2022 Medium LC958,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/same-tree 1 05 min 10 seconds 03/02/2022 Easy LC100,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/symmetric-tree 1 05 min 10 seconds 03/02/2022 Easy LC101,trees, IK, bfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-longest-consecutive-sequence 1 05 min 10 seconds 03/02/2022 Medium LC298,trees, IK, dfs Needs lots of practice.
https://leetcode.com/problems/path-sum-iii 1 05 min 10 seconds 03/02/2022 Medium LC437,trees, IK, dfs Needs lots of practice.
https://leetcode.com/problems/invert-binary-tree 1 05 min 10 seconds 03/02/2022 Easy LC226,trees, IK, dfs Needs lots of practice.
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree 1 05 min 10 seconds 03/02/2022 Medium LC236,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/longest-univalue-path 1 05 min 10 seconds 03/02/2022 Medium LC687,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/find-bottom-left-tree-value 1 05 min 10 seconds 03/02/2022 Medium LC513,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-vertical-order-traversal 1 05 min 10 seconds 03/02/2022 Medium LC314,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree 1 05 min 10 seconds 03/02/2022 Hard LC987,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/boundary-of-binary-tree 1 05 min 10 seconds 03/02/2022 Medium LC545,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-upside-down 1 05 min 10 seconds 03/02/2022 Medium LC156,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/balanced-binary-tree 1 05 min 10 seconds 03/02/2022 Easy LC110,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/largest-bst-subtree 1 05 min 10 seconds 03/02/2022 Medium LC333,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-maximum-path-sum 1 05 min 10 seconds 03/02/2022 Hard LC124,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii 1 05 min 10 seconds 03/02/2022 Medium LC117,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/merge-two-binary-trees 1 05 min 10 seconds 03/02/2022 Easy LC617,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-tilt 1 05 min 10 seconds 03/02/2022 Easy LC563,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list 1 05 min 10 seconds 03/02/2022 Medium LC426,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/kth-smallest-element-in-a-bst 1 05 min 10 seconds 03/02/2022 Medium LC230,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/flatten-binary-tree-to-linked-list 1 05 min 10 seconds 03/02/2022 Medium LC114,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-preorder-traversal 1 05 min 10 seconds 03/02/2022 Easy LC144,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-inorder-traversal 1 05 min 10 seconds 03/02/2022 Easy LC94,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-tree-postorder-traversal 1 05 min 10 seconds 03/02/2022 Easy LC145,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/binary-search-tree-iterator 1 05 min 10 seconds 03/02/2022 Medium LC173,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal 1 05 min 10 seconds 03/02/2022 Medium LC106,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree 1 05 min 10 seconds 03/02/2022 Medium LC109,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal 1 05 min 10 seconds 03/02/2022 Medium LC1008,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/serialize-and-deserialize-binary-tree 1 05 min 10 seconds 03/02/2022 Hard LC297,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/serialize-and-deserialize-bst 1 05 min 10 seconds 03/02/2022 Medium LC449,trees, IK, bottom_up_dfs Needs lots of practice.
https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph 1 05 min 10 seconds 03/07/2022 Medium LC323,graphs, IK, bfs, dfs Needs lots of practice.
https://leetcode.com/problems/graph-valid-tree 1 05 min 10 seconds 03/07/2022 Medium LC261,graphs, IK, bfs, dfs Needs lots of practice.
https://leetcode.com/problems/find-smallest-letter-greater-than-target 2 03 min 10 seconds 03/15/2022 Easy LC744,arrays, binary search Repeat
https://leetcode.com/problems/search-insert-position 2 03 min 10 seconds 03/15/2022 Easy LC35,arrays, binary search Done
https://leetcode.com/problems/first-bad-version 2 03 min 10 seconds 03/15/2022 Easy LC278, arrays, binary search Done

Things to do for prep:

Task Status
Prepare anki slides for system design concepts Just started. No progress in the last two weeks
Watch Omkar Videos daily and complete the inventory Pending
Capture notes on system design from various blogs Just started
Practice 10 LC problems daily at the minimum Not yet started
Prepare for ML theory, design and coding Not yet started
Prepare for behavioral interview Pending
Update resume and picture Pending
Respond to recruiters Pending
Watch new courses Pending

Solutions by type

No Problem Video TimeStamp Tags
1 Permutation in String - 567 Array Floater 5 Sliding Windows II Library Link 00:00 hrs Arrays, Sliding Windows
2 Find all anagrams in string - 438 Array Floater 5 Sliding Windows II Library Link 29:00 hrs Arrays, Sliding Windows
3 Sliding window median - 480 Array Floater 5 Sliding Windows II Library Link 48:55 hrs Arrays, Sliding Windows
4 Minimum Size Subarray Sum - 209 Array Floater 5 Sliding Windows II Library Link 1:40:32 hrs Arrays, Sliding Windows
5 Subarray Product Less than K - 713 Array Floater 5 Sliding Windows II Library Link 2:41:10 hrs Arrays, Sliding Windows
6 Minimum Operations to reduce x to zero - 1658 Array Floater 5 Sliding Windows II Library Link 2:59:52 hrs Arrays, Sliding Windows
7 Max Consequtive Ones III - 1004 Array Floater 5 Sliding Windows II Library Link 3:39:30 hrs Arrays, Sliding Windows
8 Fruit into Baskets - 904 Array Floater 6 Sliding Windows III Library Link 00:00 hrs Arrays, Sliding Windows
9 Longest Substring with atmost 2 distinct characters - 159 Array Floater 6 Sliding Windows III Library Link 34:10 hrs Arrays, Sliding Windows
10 Longest Substring with at most K distinct characters - 340 Array Floater 6 Sliding Windows III Library Link 49:40 hrs Arrays, Sliding Windows
11 Longest substring with no repeating characters - 3 Array Floater 6 Sliding Windows III Library Link 57:15 hrs Arrays, Sliding Windows
12 Maximum Erasure values - 1695 Array Floater 6 Sliding Windows III Library Link 1:24:16 hrs Arrays, Sliding Windows
13 Longest Continuous subarray with absolute diff less than or equal to limit - 1438 Array Floater 6 Sliding Windows III Library Link 1:44:10 hrs Arrays, Sliding Windows
14 Maximum points you can obtain from cards - 1423 Array Floater 6 Sliding Windows III Library Link 2:30:40 hrs Arrays, Sliding Windows
15 Subarrays with K different integers - 992 Array Floater 6 Sliding Windows III Library Link 2:51:27 hrs Arrays, Sliding Windows
16 Minimum window substring - 76 Array Floater 6 Sliding Windows III Library Link 3:32:20 hrs Arrays, Sliding Windows
17 Binary Search - 704 Binary Search Variant 1 Library Link 08:22 hrs Binary Search
18 Guess Number higher or lower - 374 Binary Search Variant 1 Library Link 33:15 hrs Binary Search
19 First Bad version - 278 Binary Search Variant 1 Library Link 52:47 hrs Binary Search
20 Search Insert Version - 35 Binary Search Variant 1 Library Link 1:28:25 hrs Binary Search
21 Find smallest Letter Greater than target - 744 Binary Search Variant 1 Library Link 1:42:21 hrs Binary Search
22 Critical Connections in a network - 1192 Advanced Graphs Floater 1 Schedule Link Slides 02:01 hrs Graphs
23 Cover all vertices with the least number of vertices Advanced Graphs Floater 2 Schedule Link Slides 02:58 hrs Graphs
24 Flight Routes Check Advanced Graphs Floater 2 Schedule Link Slides 55:30 hrs Graphs
25 Planets and Kingdoms Advanced Graphs Floater 3 Schedule Link Slides 17:50 hrs Graphs
26 Minimum Knight Moves - 1197 Advanced Graphs Floater 5 Schedule Link Slides 38:37 hrs Graphs, Bidirectional Search
27 Open the lock - 752 Advanced Graphs Floater 5 Schedule Link Slides 2:02:00 hrs Graphs
28 Reconstruct Itinerary - 332 Advanced Graphs Floater 6 Schedule Link Slides 3:50 hrs Graphs, Euler Graphs
29 Teleporters Path Advanced Graphs Floater 6 Schedule Link Slides 2:25:30 hrs Graphs, Euler Path
30 Mail Delivery Advanced Graphs Floater 6 Schedule Link Slides 2:29:30 hrs Graphs, Euler Cycle, Undirected
31 Network Delay Time - 743 Advanced Graphs Floater 7 Schedule Link Slides 2:30 hrs Graphs, Dijkstra
32 Path with Maximum Probability - 1514 Advanced Graphs Floater 7 Schedule Link Slides 1:09:01 hrs Graphs, Dijkstra
33 Path with Minimum Effort - 1631 Advanced Graphs Floater 7 Schedule Link Slides 1:52:40 hrs Graphs, Dijkstra
34 Letter Case Permutation - 784 Recursion: Alternative Live Class Omkar Schedule Link 40:00 hrs Recursion, Permutation
35 Subsets Recursion: Alternative Live Class Omkar Schedule Link 2:23:35 hrs Recursion, Combination
36 Permutations - 46 Recursion: Alternative Live Class Omkar Schedule Link 2:52:10 hrs Recursion, Permutation
37 Permutations II - 47 Recursion: Alternative Live Class Omkar Schedule Link Slides 4:08:20 hrs Recursion, Permutation
38 Subsets II - 90 Recursion: Alternative Live Class Omkar Schedule Link 4:34:34 hrs Recursion, Permutation
39 Letter Combinations of a phone number - 17 Recursion: Alternative Live Class Omkar Schedule Link 5:14:20 hrs Recursion, Permutation
40 Combinations - 77 Recursion: Alternative Live Class Omkar Schedule Link 5:34:30 hrs Recursion, Combinations, Backtracking
41 Combinations II - 40 Recursion: Alternative Live Class Omkar Schedule Link 6:03:04 hrs Recursion, Combinations, Backtracking
42 Climbing Stairs - 70 Dynamic Programming Part 1 Library Link 1:17:00 hrs DP Counting Problem
43 Nth Tribonacci Number Dynamic Programming Part 1 Library Link 2:11:00 hrs DP
44 Domino and Tromino Tiling - 790 Dynamic Programming Part 1 Library Link 2:16:00 hrs DP
45 Unique Paths - 62 Dynamic Programming Part 1 Library Link Slides 3:41:30 hrs DP
46 Pascal’s triangle - 118 Dynamic Programming Part 1 Library Link Slides 4:18:12 hrs DP
47 Unique Path II Dynamic Programming Part 2 Library Link Slides 20:24:00 hrs DP
48 Minimum Path Sum - 64 Dynamic Programming Part 2 Library Link Slides 1:08:40 hrs DP Optimization
49 Minimum Cost of Climbing Stairs - 746 Dynamic Programming Part 2 Library Link Slides 2:08:00 hrs DP Optimization
50 Coin Change - 322 Dynamic Programming Part 2 Library Link Slides 2:51:01 hrs DP Optimization
51 Triangle - 120 Dynamic Programming Part 2 Library Link Slides 3:21:10 hrs DP
52 House Robber - 198 Dynamic Programming Part 2 Library Link Slides 4:00:45 hrs DP
53 House Robber II - 213 Dynamic Programming Part 2 Library Link Slides 4:22:36 hrs DP
54 Minimum Cost of Tickets - 983 Dynamic Programming Part 2 Library Link Slides 4:33:50 hrs DP
55 Knight Dialer - 935 Dynamic Programming Part 3 Library Link Slides 1:07:45 hrs DP
56 Paint Fence - 276 Dynamic Programming Part 3 Library Link Slides 2:05:00 hrs DP
57 Paint House - 256 Dynamic Programming Part 3 Library Link Slides 3:31:00 hrs DP
58 Rod Cutting Dynamic Programming Part 3 Library Link Slides 3:52:00 hrs DP
59 Integer Break - 343 Dynamic Programming Part 3 Library Link Slides 4:27:00 hrs DP
60 Paint House II Dynamic Programming Part 4 Library Link Slides Page 89/90 54:00 hrs DP
61 Edit Distance - 72 Dynamic Programming Part 4 Library Link Slides 1:42:50 hrs DP
62 Longest Common Subsequence - 1143 Dynamic Programming Part 4 Library Link 3:35:40 hrs DP
63 Delete Operation for two strings - 583 Dynamic Programming Part 4 Library Link 4:20:10 hrs DP
64 Shortest Common Supersequence - 1092 Dynamic Programming Part 4 Library Link 4:42:10 hrs DP
65 Partition Equal subset sum - 416 Dynamic Programming Part 5 Schedule Link Library Link 3:12:46 hrs DP
66 Decode Ways - 91 Dynamic Programming Part 5 Schedule Link Library Link 11:10 hrs DP
67 Interleaving String - 97 Dynamic Programming Part 5 Schedule Link Library Link 1:16:40 hrs DP
68 Combination Sum IV - 377 - Medium Dynamic Programming Part 7 Library Link Schedule Link 18:25 hrs DP, Combination, Enumeration/Counting
69 Coin Change 2 - 158 - Medium Dynamic Programming Part 7 Library Link Schedule Link 1:31:50 hrs DP, Combination, Enumeration/Counting
70 Count Well formed Parenthesis Dynamic Programming Part 8 Library Link Schedule Link 5:05 hrs DP, Enumeration/Counting
71 Unique Binary Search Trees - 96 - Medium Dynamic Programming Part 8 Library Link Schedule Link 1:14:45 hrs DP,Tree, BST
72 Unique Binary Search Tree II - 95 - Medium Dynamic Programming Part 9 Library Link Schedule Link 07:10 hrs DP, Tree, BST
73 All possible full binary trees - 894 - Medium Dynamic Programming Part 9 Library Link Schedule Link 1:48:10 hrs DP, Tree, Binary_Tree
74 Different ways to add Parentheses - 241 - Medium Dynamic Programming Part 9 Library Link Schedule Link 2:42:45 hrs DP, Enumeration/Counting
75 Changing Matrix Multiplication Dynamic Programming Part 10 Library Link Schedule Link 04:20 hrs DP, Matrix
76 Burt Balloon Problem - 312 - Hard Dynamic Programming Part 10 Library Link Schedule Link 2:20:31 hrs DP
77 Valid Palindrome - 125 - Easy Dynamic Programming Part 11 Library Link Schedule Link 10:55 hrs DP
78 Valid Palindrome II - 680 - Easy Dynamic Programming Part 11 Library Link Schedule Link 34:17 hrs DP
79 Longest Palindromic Subsequence - 516 - Medium] Dynamic Programming Part 11 Library Link Schedule Link 50:52 hrs DP
80 Valid Palindrome III - 1216 - Hard Dynamic Programming Part 11 Library Link Schedule Link 2:14:15 hrs DP
81 Validate Binary Search Tree Tree Series Part 3 Schedule Link Slides Page 40 4:18:10 hrs Trees, BST, BottomUp_DFS
82 Reorder Linked List Linked List Floater 3 - List Rearrangements 2:57:30 hrs Linked_List
83 Binary Tree Level Order Traversal - 102 - Medium Tree Series Part 1 Schedule Link Slides Page 10 0:27:05 hrs Trees Binary_tree, BFS
84 Binary Tree Level Order Traversal II - 107 - Medium Tree Series Part 1 Schedule Link Slides Page 16 0:50:00 hrs Trees Binary_tree, BFS
85 Binary Tree Zigzag Level Order Traversal - 103 - Medium Tree Series Part 1 Schedule Link Slides Page 23 1:04:25 hrs Trees Binary_tree, BFS
86 Average of Levels in Binary Tree - 637 - Easy Tree Series Part 1 Schedule Link Slides Page 27 1:19:25 hrs Trees Binary_tree, BFS
87 Find Largest Value in Each Tree Row - 515 - Medium Tree Series Part 1 Schedule Link Slides Page 30 1:23:00 hrs Trees Binary_tree, BFS
88 Binary Tree Right Side View - 199 - Medium Tree Series Part 1 Schedule Link Slides Page 33 1:25:50 hrs Trees Binary_tree, BFS
89 Minimum Depth of Binary Tree - 111 - Easy Tree Series Part 1 Schedule Link Slides Page 36 1:35:15 hrs Trees Binary_tree, BFS
90 Maximum Depth of Binary Tree - 104 - Easy Tree Series Part 1 Schedule Link Slides Page 39 1:43:15 hrs Trees Binary_tree, BFS
91 Maximum Depth of N-ary Tree - 559 - Easy Tree Series Part 1 Schedule Link Slides Page 41 1:49:05 hrs Trees Binary_tree, BFS
92 Maximum Level Sum of a Binary Tree - 1161 - Medium Tree Series Part 1 Schedule Link Slides Page 43 2:19:05 hrs Trees Binary_tree, BFS
93 Univalued Binary Tree - 965 - Easy Tree Series Part 1 Schedule Link Slides Page 45 2:27:20 hrs Trees Binary_tree, BFS
94 Cousins in Binary Tree - 993 - Easy Tree Series Part 1 Schedule Link Slides Page 47 2:30:00 hrs Trees Binary_tree, BFS
95 Populating Next Right Pointers in Each Node - 116 - Medium Tree Series Part 1 Schedule Link Slides Page 51 2:40:35 hrs Trees Binary_tree, BFS
96 Add One Row to Tree - 623 - Medium Tree Series Part 1 Schedule Link Slides Page 54 2:53:00 hrs Trees Binary_tree, BFS
97 Maximum Width of Binary Tree - 662 - Medium Tree Series Part 1 Schedule Link Slides Page 58 3:08:24 hrs Trees Binary_tree, BFS
98 Check completeness of Binary Tree - 958 - Medium Tree Series Part 1 Schedule Link Slides Page 62 3:39:35 hrs Trees, Binary_tree, BFS
99 Same Tree - 100 - Easy Tree Series Part 1 Schedule Link Slides Page 65 3:57:55 hrs Trees, Binary_tree, BFS
100 Symmetric Tree - 101 - Easy Tree Series Part 1 Schedule Link Slides Page 67 4:09:10 hrs Trees, Binary_tree, BFS
101 Clone a Binary Tree (Not a leetcode problem) Tree Series Part 1 Schedule Link Slides Page 69 4:26:50 hrs Trees, Binary_tree, BFS
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Last updated on Nov 28, 2020

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