FAANG - Must do coding questions!!

 

#	Title	Difficulty	Frequency	NeetCode	Blacklist
1	Two Sum	E	10.00	Vid / Code
2	LRU Cache	M	5.69	Vid / Code
3	Number of Islands	M	5.22	Vid / Code
4	Merge Intervals	M	5.11	Vid / Code
5	Merge Sorted Array	E	4.80	Vid / Code
6	Longest Substring Without Repeating Characters	M	4.56	Vid / Code
7	Trapping Rain Water	H	4.12	Vid / Code
8	Kth Largest Element in an Array	M	3.39	Vid / Code
9	Longest Palindromic Substring	M	3.39	Vid / Code
10	Best Time to Buy and Sell Stock	E	3.29	Vid / Code
11	Group Anagrams	M	3.15	Vid / Code
12	Random Pick with Weight	M	3.04
13	Valid Palindrome II	E	2.96	Vid / Code
14	Valid Parentheses	E	2.89	Vid / Code
15	Subarray Sum Equals K	M	2.87	Vid / Code
16	3Sum	M	2.87	Vid / Code
17	Median of Two Sorted Arrays	H	2.64	Vid / Code
18	Basic Calculator II	M	2.56
19	Koko Eating Bananas	M	2.52	Vid / Code
20	Move Zeroes	E	2.49	Vid / Code
21	Longest Common Prefix	E	2.38	Vid / Code
22	Lowest Common Ancestor of a Binary Tree	M	2.33	Vid / Code
23	Add Two Numbers	M	2.33	Vid / Code
24	Maximum Subarray	M	2.33	Vid / Code
25	Merge k Sorted Lists	H	2.31	Vid / Code
26	Top K Frequent Elements	M	2.24	Vid / Code
27	Find Peak Element	M	2.24	Vid / Code
28	Simplify Path	M	2.14	Vid / Code
29	Pow(x, n)	M	2.14	Vid / Code
30	House Robber	M	2.09	Vid / Code
31	Longest Consecutive Sequence	M	2.07	Vid / Code
32	Climbing Stairs	E	2.07	Vid / Code
33	Copy List with Random Pointer	M	2.05	Vid / Code
34	Course Schedule II	M	2.02	Vid / Code
35	Spiral Matrix	M	1.95	Vid / Code
36	Merge Strings Alternately	E	1.91	Vid / Code
37	Search in Rotated Sorted Array	M	1.86	Vid / Code
38	Letter Combinations of a Phone Number	M	1.81	Vid / Code
39	Meeting Rooms II	M	1.81	Vid / Code
40	Roman to Integer	E	1.79	Vid / Code
41	Product of Array Except Self	M	1.76	Vid / Code
42	Next Permutation	M	1.76
43	Container With Most Water	M	1.74	Vid / Code
44	Valid Palindrome	E	1.72	Vid / Code
45	Rotting Oranges	M	1.67	Vid / Code
46	Reorganize String	M	1.67	Vid / Code
47	Majority Element	E	1.67	Vid / Code
48	Jump Game	M	1.67	Vid / Code
49	Palindrome Number	E	1.65	Vid / Code
50	Insert Delete GetRandom O(1)	M	1.65	Vid / Code
51	Course Schedule	M	1.62	Vid / Code
52	Diameter of Binary Tree	E	1.62	Vid / Code
53	Happy Number	E	1.60	Vid / Code
54	Max Consecutive Ones III	M	1.60
55	Rotate Image	M	1.58	Vid / Code
56	Word Ladder	H	1.58	Vid / Code
57	Sliding Window Maximum	H	1.53	Vid / Code
58	Binary Tree Right Side View	M	1.48	Vid / Code
59	Binary Tree Maximum Path Sum	H	1.44	Vid / Code
60	Find Median from Data Stream	H	1.39	Vid / Code
61	Generate Parentheses	M	1.39	Vid / Code
62	Text Justification	H	1.34	Vid / Code
63	Integer to English Words	H	1.34
64	Remove Duplicates from Sorted Array	E	1.29	Vid / Code
65	Decode String	M	1.27	Vid / Code
66	Merge Two Sorted Lists	E	1.27	Vid / Code
67	Reverse Integer	M	1.27	Vid / Code
68	Word Search	M	1.18	Vid / Code
69	Minimum Window Substring	H	1.15	Vid / Code
70	Coin Change	M	1.13	Vid / Code
71	Word Search II	H	1.13	Vid / Code
72	Valid Anagram	E	1.11	Vid / Code
73	Making A Large Island	H	1.08
74	Largest Number	M	1.08	Vid / Code
75	Find K Closest Elements	M	1.06	Vid / Code
76	Best Time to Buy and Sell Stock II	M	1.06	Vid / Code
77	Maximum Product Subarray	M	1.04	Vid / Code
78	String Compression	M	1.01
79	Asteroid Collision	M	1.01	Vid / Code
80	First Missing Positive	H	1.01	Vid / Code
81	Combination Sum	M	1.01	Vid / Code
82	Custom Sort String	M	0.99
83	Rotate Array	M	0.96	Vid / Code
84	Time Based Key-Value Store	M	0.96	Vid / Code
85	Integer to Roman	M	0.96	Vid / Code
86	Pascal's Triangle	E	0.94	Vid / Code
87	Sort Colors	M	0.94	Vid / Code
88	Word Break	M	0.94	Vid / Code
89	Longest Repeating Character Replacement	M	0.94	Vid / Code
90	Reverse Linked List	E	0.94	Vid / Code
91	Jump Game II	M	0.92	Vid / Code
92	Regular Expression Matching	H	0.89	Vid / Code
93	Remove Element	E	0.87	Vid / Code
94	Find First and Last Position of Element in Sorted Array	M	0.87	Vid / Code
95	Sqrt(x)	E	0.85	Vid / Code
96	LFU Cache	H	0.85
97	Reverse Nodes in k-Group	H	0.85	Vid / Code
98	Walls and Gates	M	0.82	Vid / Code
99	Unique Paths	M	0.82	Vid / Code
100	Largest Rectangle in Histogram	H	0.82	Vid / Code
101	Vertical Order Traversal of a Binary Tree	H	0.82
102	Search Suggestions System	M	0.82
103	Permutation in String	M	0.80	Vid / Code
104	Daily Temperatures	M	0.78	Vid / Code
105	Accounts Merge	M	0.75	Vid / Code
106	Longest Increasing Subsequence	M	0.75	Vid / Code
107	Design Tic-Tac-Toe	M	0.73
108	Binary Tree Zigzag Level Order Traversal	M	0.71	Vid / Code
109	Set Matrix Zeroes	M	0.71	Vid / Code
110	Plus One	E	0.71	Vid / Code
111	Decode Ways	M	0.71	Vid / Code
112	Basic Calculator	H	0.71
113	Implement Trie (Prefix Tree)	M	0.68	Vid / Code
114	Design Hit Counter	M	0.68
115	Interval List Intersections	M	0.68
116	All O`one Data Structure	H	0.68
117	Remove Nth Node From End of List	M	0.68	Vid / Code
118	Split Array Largest Sum	H	0.68	Vid / Code
119	Evaluate Division	M	0.68
120	Longest Increasing Path in a Matrix	H	0.68	Vid / Code
121	Valid Sudoku	M	0.66	Vid / Code
122	Reverse Words in a String	M	0.66
123	Restore IP Addresses	M	0.64
124	First Unique Character in a String	E	0.64
125	Task Scheduler	M	0.64	Vid / Code
126	Gas Station	M	0.64	Vid / Code
127	Bus Routes	H	0.64
128	Edit Distance	M	0.64	Vid / Code
129	Remove All Adjacent Duplicates In String	E	0.61
130	Contains Duplicate	E	0.61	Vid / Code
131	Top K Frequent Words	M	0.61
132	Evaluate Reverse Polish Notation	M	0.61	Vid / Code
133	Missing Number	E	0.61	Vid / Code
134	Permutations	M	0.59	Vid / Code
135	Clone Graph	M	0.59	Vid / Code
136	All Nodes Distance K in Binary Tree	M	0.59
137	String to Integer (atoi)	M	0.59
138	Find Minimum in Rotated Sorted Array	M	0.59	Vid / Code
139	Serialize and Deserialize Binary Tree	H	0.59	Vid / Code
140	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	M	0.56
141	Alien Dictionary	H	0.56	Vid / Code
142	Maximal Rectangle	H	0.56
143	Single Number	E	0.56	Vid / Code
144	House Robber II	M	0.56	Vid / Code
145	Find the Length of the Longest Common Prefix	M	0.56
146	Add Binary	E	0.56	Vid / Code
147	Add Two Integers	E	0.56
148	Sudoku Solver	H	0.54
149	Candy	H	0.54
150	Minimum Path Sum	M	0.54	Vid / Code
151	Find All Anagrams in a String	M	0.54	Vid / Code
152	Compare Version Numbers	M	0.54
153	Kth Missing Positive Number	E	0.54
154	Intersection of Two Arrays	E	0.54
155	Lowest Common Ancestor of a Binary Search Tree	M	0.52	Vid / Code
156	Min Stack	M	0.52	Vid / Code
157	Validate Binary Search Tree	M	0.52	Vid / Code
158	Ransom Note	E	0.52
159	Remove K Digits	M	0.52	Vid / Code
160	Find the Index of the First Occurrence in a String	E	0.52	Vid / Code
161	Rotate List	M	0.52	Vid / Code
162	Max Area of Island	M	0.52	Vid / Code
163	3Sum Closest	M	0.49
164	Search a 2D Matrix	M	0.49	Vid / Code
165	Combination Sum II	M	0.49	Vid / Code
166	4Sum	M	0.49	Vid / Code
167	Is Subsequence	E	0.47	Vid / Code
168	Divide Two Integers	M	0.47
169	Design HashMap	E	0.47	Vid / Code
170	Shortest Palindrome	H	0.45
171	Maximal Square	M	0.45	Vid / Code
172	Find the Closest Palindrome	H	0.45
173	Swap Nodes in Pairs	M	0.45	Vid / Code
174	Flatten Binary Tree to Linked List	M	0.45
175	Squares of a Sorted Array	E	0.45	Vid / Code
176	Frequency of the Most Frequent Element	M	0.45	Vid / Code
177	Find the Duplicate Number	M	0.45	Vid / Code
178	Search Insert Position	E	0.45	Vid / Code
179	Next Greater Element III	M	0.42
180	Intersection of Two Arrays II	E	0.42
181	Rank Teams by Votes	M	0.42
182	Delete and Earn	M	0.42	Vid / Code
183	Palindrome Linked List	E	0.42	Vid / Code
184	Next Greater Element I	E	0.42	Vid / Code
185	Linked List Cycle	E	0.42	Vid / Code
186	Next Greater Element II	M	0.42
187	Longest Valid Parentheses	H	0.40
188	Find Common Characters	E	0.40
189	Reverse Linked List II	M	0.40	Vid / Code
190	Word Ladder II	H	0.40
191	Score of a String	E	0.40
192	Most Profit Assigning Work	M	0.40
193	Reorder Routes to Make All Paths Lead to the City Zero	M	0.40
194	Shortest Bridge	M	0.40
195	Is Graph Bipartite?	M	0.38
196	Reverse Substrings Between Each Pair of Parentheses	M	0.38
197	Concatenated Words	H	0.38
198	Ugly Number II	M	0.38
199	Contiguous Array	M	0.38
200	Populating Next Right Pointers in Each Node	M	0.38
201	Meeting Rooms III	H	0.38
202	Reorder List	M	0.38	Vid / Code
203	Number of Distinct Islands	M	0.38
204	Construct Binary Tree from Preorder and Inorder Traversal	M	0.35	Vid / Code
205	Kth Smallest Element in a BST	M	0.35	Vid / Code
206	01 Matrix	M	0.35
207	Intersection of Two Linked Lists	E	0.35	Vid / Code
208	Count Subarrays With Fixed Bounds	H	0.35
209	Reverse Pairs	H	0.35
210	Sum of Subarray Minimums	M	0.35
211	Validate IP Address	M	0.35
212	Longest Common Subsequence	M	0.35	Vid / Code
213	Reverse Vowels of a String	E	0.35
214	Delete Node in a BST	M	0.33	Vid / Code
215	Fibonacci Number	E	0.33	Vid / Code
216	Same Tree	E	0.33	Vid / Code
217	Unique Paths II	M	0.33	Vid / Code
218	Count Number of Nice Subarrays	M	0.33
219	Find the Celebrity	M	0.33
220	First Bad Version	E	0.33
221	Perfect Squares	M	0.33
222	N-Queens	H	0.33	Vid / Code
223	Design Snake Game	M	0.33
224	H-Index	M	0.31
225	Flood Fill	E	0.31
226	Sort List	M	0.31	Vid / Code
227	Minimum Operations to Write the Letter Y on a Grid	M	0.31
228	Different Ways to Add Parentheses	M	0.31
229	Binary Tree Level Order Traversal	M	0.31	Vid / Code
230	Two Sum II - Input Array Is Sorted	M	0.31	Vid / Code
231	Split Message Based on Limit	H	0.31
232	Subarray Product Less Than K	M	0.31
233	Non-overlapping Intervals	M	0.31	Vid / Code
234	Binary Tree Cameras	H	0.28
235	Balanced Binary Tree	E	0.28	Vid / Code
236	Kth Smallest Element in a Sorted Matrix	M	0.28
237	Subsets II	M	0.28	Vid / Code
238	IPO	H	0.28	Vid / Code
239	Multiply Strings	M	0.28	Vid / Code
240	Design File System	M	0.28
241	Number of Flowers in Full Bloom	H	0.28
242	Island Perimeter	E	0.26	Vid / Code
243	The kth Factor of n	M	0.26
244	Sort an Array	M	0.26	Vid / Code
245	Patching Array	H	0.26
246	Excel Sheet Column Number	E	0.26
247	Find All Possible Recipes from Given Supplies	M	0.24
248	Game of Life	M	0.24
249	Transpose Matrix	E	0.24
250	Binary Tree Inorder Traversal	E	0.24	Vid / Code
251	Search in Rotated Sorted Array II	M	0.24
252	Maximum Number of Ways to Partition an Array	H	0.24
253	Maximum Number of Points with Cost	M	0.24
254	Divide Nodes Into the Maximum Number of Groups	H	0.24
255	Linked List Cycle II	M	0.24
256	Coin Change II	M	0.24	Vid / Code
257	Target Sum	M	0.24	Vid / Code
258	Minimum Cost For Tickets	M	0.24
259	Find K Pairs with Smallest Sums	M	0.21
260	Grumpy Bookstore Owner	M	0.21
261	The Skyline Problem	H	0.21
262	Spiral Matrix III	M	0.21
263	Add Edges to Make Degrees of All Nodes Even	H	0.21
264	Minimum Cost to Hire K Workers	H	0.21
265	Best Time to Buy and Sell Stock III	H	0.21
266	Implement Queue using Stacks	E	0.21	Vid / Code
267	Count Binary Substrings	E	0.21
268	Minimum Deletions to Make String Balanced	M	0.21
269	Magnetic Force Between Two Balls	M	0.21
270	Path Sum	E	0.21	Vid / Code
271	Water Bottles	E	0.21
272	Maximum Points You Can Obtain from Cards	M	0.21
273	Split Linked List in Parts	M	0.21
274	Number of Steps to Reduce a Number in Binary Representation to One	M	0.21
275	Range Sum Query - Immutable	E	0.19	Vid / Code
276	Min Cost Climbing Stairs	E	0.19	Vid / Code
277	Online Stock Span	M	0.19	Vid / Code
278	Minimize Malware Spread	H	0.19
279	Minimum Falling Path Sum	M	0.19	Vid / Code
280	Largest Time for Given Digits	M	0.19
281	Construct Quad Tree	M	0.19
282	Shuffle an Array	M	0.19
283	Interleaving String	M	0.19	Vid / Code
284	Longest Substring with At Most K Distinct Characters	M	0.19
285	Minimum Size Subarray Sum	M	0.19	Vid / Code
286	Number of Islands II	H	0.19
287	Angle Between Hands of a Clock	M	0.19
288	Furthest Building You Can Reach	M	0.19	Vid / Code
289	Encode and Decode Strings	M	0.19	Vid / Code
290	Graph Valid Tree	M	0.19	Vid / Code
291	Maximum Number of Accepted Invitations	M	0.19
292	Shortest Word Distance	E	0.19
293	Longest Path With Different Adjacent Characters	H	0.19
294	Search a 2D Matrix II	M	0.19
295	K-th Smallest Prime Fraction	M	0.16
296	Largest Divisible Subset	M	0.16
297	Check If Array Pairs Are Divisible by k	M	0.16
298	The Maze	M	0.16
299	Find Pivot Index	E	0.16	Vid / Code
300	Maximum Units on a Truck	E	0.16
301	My Calendar I	M	0.16
302	All Paths From Source to Target	M	0.16
303	Populating Next Right Pointers in Each Node II	M	0.16
304	Find Missing Observations	M	0.16
305	Sort Array By Parity	E	0.16
306	Stock Price Fluctuation	M	0.14
307	Find the City With the Smallest Number of Neighbors at a Threshold Distance	M	0.14
308	Optimal Partition of String	M	0.14	Vid / Code
309	Fruit Into Baskets	M	0.14	Vid / Code
310	Longest String Chain	M	0.14
311	Leftmost Column with at Least a One	M	0.14
312	Number of Digit One	H	0.14
313	Remove Duplicate Letters	M	0.14
314	Search in a Binary Search Tree	E	0.14
315	Kth Largest Element in a Stream	E	0.14	Vid / Code
316	Replace Words	M	0.12
317	Remove Duplicates from Sorted List II	M	0.12
318	Excel Sheet Column Title	E	0.12	Vid / Code
319	Maximum Total Importance of Roads	M	0.12
320	Serialize and Deserialize N-ary Tree	H	0.12
321	Minimum Number of Taps to Open to Water a Garden	H	0.12
322	Add Two Numbers II	M	0.12
323	Count Palindromic Subsequences	H	0.12
324	Jump Game III	M	0.09
325	Parsing A Boolean Expression	H	0.09
326	Minimum Number of Operations to Make X and Y Equal	M	0.09
327	Count the Number of Good Subarrays	M	0.09
328	Rectangle Area	M	0.09
329	Design Memory Allocator	M	0.09
330	Count Nodes Equal to Average of Subtree	M	0.09
331	Second Minimum Time to Reach Destination	H	0.09
332	N-Queens II	H	0.09	Vid / Code
333	Max Number of K-Sum Pairs	M	0.09
334	Insert into a Binary Search Tree	M	0.09	Vid / Code
335	Convert Sorted Array to Binary Search Tree	E	0.09	Vid / Code
336	Count of Smaller Numbers After Self	H	0.09
337	Pancake Sorting	M	0.09
338	Remove Comments	M	0.09
339	Majority Element II	M	0.09
340	Largest Multiple of Three	H	0.09
341	The Latest Time to Catch a Bus	M	0.07
342	Shortest Common Supersequence	H	0.07
343	Two Sum IV - Input is a BST	E	0.07
344	Maximum Frequency Stack	H	0.07
345	Valid Perfect Square	E	0.07	Vid / Code
346	Smallest String With Swaps	M	0.07
347	Recover Binary Search Tree	M	0.07
348	Minimum Number of Food Buckets to Feed the Hamsters	M	0.07
349	Maximize Greatness of an Array	M	0.07
350	Possible Bipartition	M	0.07
351	Subarrays with K Different Integers	H	0.07
352	Design a Text Editor	H	0.05
353	Largest Combination With Bitwise AND Greater Than Zero	M	0.05
354	Count Submatrices With Equal Frequency of X and Y	M	0.05
355	Maximum Energy Boost From Two Drinks	M	0.05
356	Candy Crush	M	0.05
357	Leaf-Similar Trees	E	0.05
358	Minimum Absolute Difference Between Elements With Constraint	M	0.05
359	Max Chunks To Make Sorted	M	0.05
360	Maximum Twin Sum of a Linked List	M	0.05	Vid / Code
361	High-Access Employees	M	0.05
362	Water Bottles II	M	0.05
363	Maximum Number of Intersections on the Chart	H	0.05
364	Minimum Number of Operations to Make Array Continuous	H	0.05
365	Frog Jump II	M	0.05
366	Merge BSTs to Create Single BST	H	0.05
367	Strong Password Checker	H	0.05
368	Cinema Seat Allocation	M	0.05
369	Rectangle Overlap	E	0.05
370	Find the Town Judge	E	0.05
371	Masking Personal Information	M	0.05
372	Maximum Size Subarray Sum Equals k	M	0.05
373	Maximum Number of Events That Can Be Attended II	H	0.05
374	Sum of Nodes with Even-Valued Grandparent	M	0.05
375	Find the Most Competitive Subsequence	M	0.05
376	Spiral Matrix II	M	0.05
377	Add Bold Tag in String	M	0.05
378	Maximum Number of Operations With the Same Score II	M	0.05
379	Construct Binary Tree from Inorder and Postorder Traversal	M	0.05	Vid / Code
380	Inorder Successor in BST II	M	0.05
381	Make Two Arrays Equal by Reversing Subarrays	E	0.05
382	Keyboard Row	E	0.05
383	Circular Array Loop	M	0.05
384	Design Browser History	M	0.05	Vid / Code
385	Hamming Distance	E	0.05
386	Cousins in Binary Tree	E	0.05
387	Total Hamming Distance	M	0.05
388	Number of Matching Subsequences	M	0.05
389	Find Subarray With Bitwise OR Closest to K	H	0.05