Top_LeetCode_Questions_By_Topic.md

DataStructures & Algorithm Problems

Array, Linked List, Stack, Heap, Graph, Tree, Queue

#	Title	Acceptance	Difficulty
1	Two Sum	44.40%	Easy
2	Add Two Numbers	31.50%	Medium
4	Median of Two Sorted Arrays	26.90%	Hard
42	Trapping Rain Water	44.00%	Hard
3	Longest Substring Without Repeating Characters	28.70%	Medium
15	3Sum	24.50%	Medium
973	K Closest Points to Origin	61.60%	Medium
53	Maximum Subarray	44.10%	Easy
21	Merge Two Sorted Lists	48.20%	Easy
23	Merge k Sorted Lists	35.40%	Hard
56	Merge Intervals	36.20%	Medium
206	Reverse Linked List	56.00%	Easy
20	Valid Parentheses	37.00%	Easy
253	Meeting Rooms II	43.20%	Medium
297	Serialize and Deserialize Binary Tree	41.90%	Hard
76	Minimum Window Substring	31.50%	Hard
238	Product of Array Except Self	55.90%	Medium
121	Best Time to Buy and Sell Stock	47.80%	Easy
33	Search in Rotated Sorted Array	33.10%	Medium
49	Group Anagrams	48.30%	Medium
11	Container With Most Water	45.80%	Medium
560	Subarray Sum Equals K	42.60%	Medium
336	Palindrome Pairs	31.50%	Hard
771	Jewels and Stones	83.40%	Easy
289	Game of Life	46.80%	Medium
79	Word Search	31.90%	Medium
269	Alien Dictionary	31.70%	Hard
380	Insert Delete GetRandom O(1)	43.30%	Medium
88	Merge Sorted Array	36.40%	Easy
31	Next Permutation	30.80%	Medium
295	Find Median from Data Stream	37.70%	Hard
138	Copy List with Random Pointer	28.10%	Medium
332	Reconstruct Itinerary	32.10%	Medium
811	Subdomain Visit Count	66.10%	Easy
54	Spiral Matrix	31.00%	Medium
215	Kth Largest Element in an Array	49.00%	Medium
394	Decode String	45.70%	Medium
981	Time Based Key-Value Store	51.10%	Medium
224	Basic Calculator	33.40%	Hard
155	Min Stack	38.00%	Easy
609	Find Duplicate File in System	55.90%	Medium
41	First Missing Positive	29.40%	Hard
692	Top K Frequent Words	46.50%	Medium
124	Binary Tree Maximum Path Sum	30.50%	Hard
85	Maximal Rectangle	34.10%	Hard
283	Move Zeroes	54.80%	Easy
341	Flatten Nested List Iterator	48.60%	Medium
126	Word Ladder II	18.30%	Hard
103	Binary Tree Zigzag Level Order Traversal	42.60%	Medium
149	Max Points on a Line	16.00%	Hard

Hash Table

#	Title	Acceptance	Difficulty
1	Two Sum	45.50%	Easy
771	Jewels and Stones	86.20%	Easy
3	Longest Substring Without Repeating Characters	30.30%	Medium
136	Single Number	65.30%	Easy
535	Encode and Decode TinyURL	79.60%	Medium
85	Maximal Rectangle	37.40%	Hard
138	Copy List with Random Pointer	35.80%	Medium
202	Happy Number	50.30%	Easy
149	Max Points on a Line	16.90%	Hard
49	Group Anagrams	56.40%	Medium
739	Daily Temperatures	63.10%	Medium
463	Island Perimeter	65.50%	Easy
76	Minimum Window Substring	34.50%	Hard
37	Sudoku Solver	43.20%	Hard
18	4Sum	33.50%	Medium
347	Top K Frequent Elements	60.40%	Medium
336	Palindrome Pairs	33.50%	Hard
219	Contains Duplicate II	37.60%	Easy
217	Contains Duplicate	55.90%	Easy
36	Valid Sudoku	48.50%	Medium
349	Intersection of Two Arrays	62.10%	Easy
560	Subarray Sum Equals K	43.90%	Medium
187	Repeated DNA Sequences	38.70%	Medium
204	Count Primes	31.30%	Easy
242	Valid Anagram	56.60%	Easy
500	Keyboard Row	64.60%	Easy
811	Subdomain Visit Count	69.60%	Easy
609	Find Duplicate File in System	59.30%	Medium
30	Substring with Concatenation of All Words	25.30%	Hard
94	Binary Tree Inorder Traversal	62.90%	Medium
166	Fraction to Recurring Decimal	21.50%	Medium
770	Basic Calculator IV	47.60%	Hard
387	First Unique Character in a String	53.30%	Easy
205	Isomorphic Strings	39.70%	Easy
380	Insert Delete GetRandom O(1)	47.40%	Medium
447	Number of Boomerangs	51.70%	Easy
760	Find Anagram Mappings	81.00%	Easy
981	Time Based Key-Value Store	52.90%	Medium
350	Intersection of Two Arrays II	51.20%	Easy
299	Bulls and Cows	42.30%	Easy
389	Find the Difference	55.10%	Easy
706	Design HashMap	60.90%	Easy
632	Smallest Range Covering Elements from K Lists	52.10%	Hard
454	4Sum II	53.10%	Medium
718	Maximum Length of Repeated Subarray	49.20%	Medium
290	Word Pattern	36.90%	Easy
1002	Find Common Characters	67.60%	Easy
953	Verifying an Alien Dictionary	54.30%	Easy
311	Sparse Matrix Multiplication	61.50%	Medium
974	Subarray Sums Divisible by K	48.60%	Medium
575	Distribute Candies	61.30%	Easy
692	Top K Frequent Words	51.50%	Medium
274	H-Index	35.80%	Medium
1048	Longest String Chain	54.50%	Medium
690	Employee Importance	57.00%	Easy
438	Find All Anagrams in a String	43.00%	Medium
244	Shortest Word Distance II	52.20%	Medium
340	Longest Substring with At Most K Distinct Characters	43.90%	Hard
992	Subarrays with K Different Integers	48.10%	Hard
939	Minimum Area Rectangle	51.90%	Medium
359	Logger Rate Limiter	70.30%	Easy
451	Sort Characters By Frequency	62.80%	Medium
266	Palindrome Permutation	61.80%	Easy
409	Longest Palindrome	50.20%	Easy
159	Longest Substring with At Most Two Distinct Characters	49.20%	Medium
895	Maximum Frequency Stack	60.50%	Hard
355	Design Twitter	30.10%	Medium
726	Number of Atoms	48.50%	Hard
1152	Analyze User Website Visit Pattern	43.60%	Medium
594	Longest Harmonious Subsequence	46.40%	Easy
325	Maximum Size Subarray Sum Equals k	46.70%	Medium
249	Group Shifted Strings	54.50%	Medium
1072	Flip Columns For Maximum Number of Equal Rows	60.70%	Medium
987	Vertical Order Traversal of a Binary Tree	35.40%	Medium
1365	How Many Numbers Are Smaller Than the Current Number	85.30%	Easy
1086	High Five	79.20%	Easy
957	Prison Cells After N Days	41.20%	Medium
508	Most Frequent Subtree Sum	57.70%	Medium
525	Contiguous Array	42.60%	Medium
381	Insert Delete GetRandom O(1) - Duplicates allowed	34.00%	Hard
170	Two Sum III - Data structure design	33.40%	Easy
720	Longest Word in Dictionary	48.10%	Easy
554	Brick Wall	49.90%	Medium
694	Number of Distinct Islands	55.70%	Medium
648	Replace Words	56.20%	Medium
781	Rabbits in Forest	54.30%	Medium
961	N-Repeated Element in Size 2N Array	73.60%	Easy
705	Design HashSet	60.60%	Easy
645	Set Mismatch	42.10%	Easy
246	Strobogrammatic Number	44.90%	Easy
1044	Longest Duplicate Substring	32.00%	Hard
748	Shortest Completing Word	56.50%	Easy
1001	Grid Illumination	35.80%	Hard
966	Vowel Spellchecker	47.20%	Medium
676	Implement Magic Dictionary	54.30%	Medium
599	Minimum Index Sum of Two Lists	50.60%	Easy
711	Number of Distinct Islands II	47.20%	Hard
930	Binary Subarrays With Sum	42.70%	Medium
1224	Maximum Equal Frequency	33.30%	Hard
710	Random Pick with Blacklist	32.40%	Hard
734	Sentence Similarity	42.00%	Easy
884	Uncommon Words from Two Sentences	63.10%	Easy
1490	Clone N-ary Tree	86.10%	Medium
1090	Largest Values From Labels	58.60%	Medium
288	Unique Word Abbreviation	21.80%	Medium
624	Maximum Distance in Arrays	38.80%	Easy
1178	Number of Valid Words for Each Puzzle	37.80%	Hard
358	Rearrange String k Distance Apart	34.70%	Hard
1138	Alphabet Board Path	48.30%	Medium
1244	Design A Leaderboard	59.40%	Medium
1160	Find Words That Can Be Formed by Characters	67.40%	Easy
1189	Maximum Number of Balloons	61.10%	Easy
970	Powerful Integers	39.80%	Easy
1078	Occurrences After Bigram	64.60%	Easy
356	Line Reflection	31.60%	Medium
1311	Get Watched Videos by Your Friends	42.90%	Medium

Binary Search

#	Title	Acceptance	Difficulty
4	Median of Two Sorted Arrays	29.40%	Hard
#	50	Pow(x, n)	29.70%
33	Search in Rotated Sorted Array	34.50%	Medium
315	Count of Smaller Numbers After Self	41.40%	Hard
167	Two Sum II - Input array is sorted	53.80%	Easy
287	Find the Duplicate Number	55.20%	Medium
349	Intersection of Two Arrays	62.10%	Easy
29	Divide Two Integers	16.40%	Medium
153	Find Minimum in Rotated Sorted Array	44.80%	Medium
240	Search a 2D Matrix II	43.10%	Medium
327	Count of Range Sum	35.00%	Hard
378	Kth Smallest Element in a Sorted Matrix	54.00%	Medium
222	Count Complete Tree Nodes	46.30%	Medium
69	Sqrt(x)	33.80%	Easy
410	Split Array Largest Sum	44.40%	Hard
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	70.20%	Medium
162	Find Peak Element	43.20%	Medium
300	Longest Increasing Subsequence	42.50%	Medium
363	Max Sum of Rectangle No Larger Than K	37.20%	Hard
34	Find First and Last Position of Element in Sorted Array	36.00%	Medium
981	Time Based Key-Value Store	52.90%	Medium
35	Search Insert Position	42.60%	Easy
354	Russian Doll Envelopes	35.50%	Hard
209	Minimum Size Subarray Sum	37.90%	Medium
350	Intersection of Two Arrays II	51.20%	Easy
278	First Bad Version	35.40%	Easy
454	4Sum II	53.10%	Medium
374	Guess Number Higher or Lower	42.80%	Easy
718	Maximum Length of Repeated Subarray	49.20%	Medium
852	Peak Index in a Mountain Array	71.60%	Easy
174	Dungeon Game	32.10%	Hard
230	Kth Smallest Element in a BST	59.80%	Medium
352	Data Stream as Disjoint Intervals	47.00%	Hard
887	Super Egg Drop	27.10%	Hard
475	Heaters	33.10%	Easy
154	Find Minimum in Rotated Sorted Array II	40.60%	Hard
81	Search in Rotated Sorted Array II	33.00%	Medium
74	Search a 2D Matrix	36.40%	Medium
528	Random Pick with Weight	43.90%	Medium
1011	Capacity To Ship Packages Within D Days	58.00%	Medium
493	Reverse Pairs	25.00%	Hard
862	Shortest Subarray with Sum at Least K	24.40%	Hard
719	Find K-th Smallest Pair Distance	31.40%	Hard
1235	Maximum Profit in Job Scheduling	44.30%	Hard
875	Koko Eating Bananas	51.80%	Medium
911	Online Election	50.20%	Medium
392	Is Subsequence	49.10%	Easy
1237	Find Positive Integer Solution for a Given Equation	69.40%	Easy
778	Swim in Rising Water	52.70%	Hard
786	K-th Smallest Prime Fraction	41.30%	Hard
658	Find K Closest Elements	40.70%	Medium
270	Closest Binary Search Tree Value	47.80%	Easy
1157	Online Majority Element In Subarray	38.90%	Hard
1201	Ugly Number III	25.70%	Medium
1044	Longest Duplicate Substring	32.00%	Hard
367	Valid Perfect Square	41.60%	Easy
1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	48.60%	Medium
483	Smallest Good Base	35.60%	Hard
644	Maximum Average Subarray II	31.80%	Hard
441	Arranging Coins	42.00%	Easy
275	H-Index II	35.90%	Medium
436	Find Right Interval	45.20%	Medium
1231	Divide Chocolate	52.20%	Hard
878	Nth Magical Number	28.30%	Hard
497	Random Point in Non-overlapping Rectangles	37.70%	Medium
710	Random Pick with Blacklist	32.40%	Hard
668	Kth Smallest Number in Multiplication Table	45.40%	Hard
1060	Missing Element in Sorted Array	54.40%	Medium
927	Three Equal Parts	33.40%	Hard
1300	Sum of Mutated Array Closest to Target	44.70%	Medium
774	Minimize Max Distance to Gas Station	46.80%	Hard
302	Smallest Rectangle Enclosing Black Pixels	51.50%	Hard
1482	Minimum Number of Days to Make m Bouquets	44.80%	Medium
793	Preimage Size of Factorial Zeroes Function	40.20%	Hard
1095	Find in Mountain Array	35.80%	Hard
702	Search in a Sorted Array of Unknown Size	66.40%	Medium
1283	Find the Smallest Divisor Given a Threshold	46.80%	Medium
704	Binary Search	51.80%	Easy
1351	Count Negative Numbers in a Sorted Matrix	76.80%	Easy
744	Find Smallest Letter Greater Than Target	45.40%	Easy
1064	Fixed Point	66.70%	Easy
1337	The K Weakest Rows in a Matrix	68.50%	Easy
1198	Find Smallest Common Element in All Rows	74.80%	Medium
1182	Shortest Distance to Target Color	52.60%	Medium
1150	Check If a Number Is Majority Element in a Sorted Array	59.60%	Easy

Recursion

#	Title	Acceptance	Difficulty
761	Special Binary String	54.50%	Hard
938	Range Sum of BST	81.10%	Easy
894	All Possible Full Binary Trees	74.80%	Medium
698	Partition to K Equal Sum Subsets	45.00%	Medium
687	Longest Univalue Path	36.00%	Easy
726	Number of Atoms	48.50%	Hard
247	Strobogrammatic Number II	47.50%	Medium
783	Minimum Distance Between BST Nodes	52.40%	Easy
248	Strobogrammatic Number III	39.50%	Hard
794	Valid Tic-Tac-Toe State	32.60%	Medium
776	Split BST	55.70%	Medium
544	Output Contest Matches	75.10%	Medium
779	K-th Symbol in Grammar	37.10%	Medium
1137	N-th Tribonacci Number	56.00%	Easy
625	Minimum Factorization	32.80%	Medium

Backtracking

#	Title	Acceptance	Difficulty
22	Generate Parentheses	57.40%	Medium
10	Regular Expression Matching	25.80%	Hard
17	Letter Combinations of a Phone Number	43.20%	Medium
46	Permutations	57.80%	Medium
79	Word Search	32.50%	Medium
212	Word Search II	30.30%	Hard
51	N-Queens	41.70%	Hard
78	Subsets	55.50%	Medium
39	Combination Sum	51.10%	Medium
37	Sudoku Solver	39.00%	Hard
126	Word Ladder II	19.10%	Hard
93	Restore IP Addresses	32.60%	Medium
44	Wildcard Matching	23.50%	Hard
140	Word Break II	28.40%	Hard
40	Combination Sum II	43.80%	Medium
47	Permutations II	42.50%	Medium
980	Unique Paths III	71.50%	Hard
131	Palindrome Partitioning	43.00%	Medium
77	Combinations	50.10%	Medium
211	Add and Search Word - Data structure design	32.10%	Medium
291	Word Pattern II	42.00%	Hard
306	Additive Number	28.70%	Medium
1066	Campus Bikes II	52.60%	Medium
691	Stickers to Spell Word	39.70%	Hard
90	Subsets II	43.90%	Medium
1087	Brace Expansion	59.60%	Medium
351	Android Unlock Patterns	46.90%	Medium
425	Word Squares	45.50%	Hard

Divide and Conquer

#	Title	Acceptance	Difficulty
4	Median of Two Sorted Arrays	26.90%	Hard
973	K Closest Points to Origin	61.60%	Medium
53	Maximum Subarray	44.10%	Easy
23	Merge k Sorted Lists	35.40%	Hard
215	Kth Largest Element in an Array	49.00%	Medium
218	The Skyline Problem	32.10%	Hard
426	Convert Binary Search Tree to Sorted Doubly Linked List	53.20%	Medium
312	Burst Balloons	48.00%	Hard
315	Count of Smaller Numbers After Self	38.80%	Hard
240	Search a 2D Matrix II	41.20%	Medium

Greedy Algorithm

#	Title	Acceptance	Difficulty
122	Best Time to Buy and Sell Stock II	56.60%	Easy
406	Queue Reconstruction by Height	66.60%	Medium
316	Remove Duplicate Letters	35.60%	Hard
621	Task Scheduler	48.60%	Medium
763	Partition Labels	75.60%	Medium
45	Jump Game II	30.40%	Hard
253	Meeting Rooms II	45.60%	Medium
134	Gas Station	38.20%	Medium
135	Candy	31.40%	Hard
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	70.20%	Medium
55	Jump Game	34.50%	Medium
767	Reorganize String	48.30%	Medium
759	Employee Free Time	65.80%	Hard
321	Create Maximum Number	26.90%	Hard
44	Wildcard Matching	24.60%	Hard
861	Score After Flipping Matrix	72.50%	Medium
714	Best Time to Buy and Sell Stock with Transaction Fee	54.30%	Medium
765	Couples Holding Hands	54.20%	Hard
455	Assign Cookies	49.80%	Easy
1221	Split a String in Balanced Strings	83.00%	Easy
330	Patching Array	34.40%	Hard
1007	Minimum Domino Rotations For Equal Row	49.90%	Medium
452	Minimum Number of Arrows to Burst Balloons	49.40%	Medium
1057	Campus Bikes	57.90%	Medium
376	Wiggle Subsequence	39.50%	Medium
659	Split Array into Consecutive Subsequences	43.60%	Medium
1282	Group the People Given the Group Size They Belong To	83.90%	Medium
944	Delete Columns to Make Sorted	70.20%	Easy
630	Course Schedule III	33.30%	Hard
910	Smallest Range II	26.50%	Medium
1217	Play with Chips	64.30%	Easy
392	Is Subsequence	49.10%	Easy
991	Broken Calculator	45.30%	Medium
870	Advantage Shuffle	45.30%	Medium
936	Stamping The Sequence	42.10%	Hard
402	Remove K Digits	28.40%	Medium
502	IPO	40.20%	Hard
995	Minimum Number of K Consecutive Bit Flips	46.40%	Hard
435	Non-overlapping Intervals	42.80%	Medium
1029	Two City Scheduling	55.90%	Easy
921	Minimum Add to Make Parentheses Valid	73.40%	Medium
948	Bag of Tokens	40.70%	Medium
874	Walking Robot Simulation	35.10%	Easy
881	Boats to Save People	46.50%	Medium
842	Split Array into Fibonacci Sequence	36.20%	Medium
1167	Minimum Cost to Connect Sticks	62.60%	Medium
1055	Shortest Way to Form String	57.00%	Medium
984	String Without AAA or BBB	37.20%	Medium
1231	Divide Chocolate	52.20%	Hard
1247	Minimum Swaps to Make Strings Equal	59.90%	Medium
1326	Minimum Number of Taps to Open to Water a Garden	43.10%	Hard
738	Monotone Increasing Digits	44.10%	Medium
757	Set Intersection Size At Least Two	39.80%	Hard
1090	Largest Values From Labels	58.60%	Medium
649	Dota2 Senate	39.10%	Medium
860	Lemonade Change	51.50%	Easy
1405	Longest Happy String	48.00%	Medium
927	Three Equal Parts	33.40%	Hard
1094	Car Pooling	56.60%	Medium
358	Rearrange String k Distance Apart	34.70%	Hard
955	Delete Columns to Make Sorted II	33.20%	Medium
1353	Maximum Number of Events That Can Be Attended	30.60%	Medium
1296	Divide Array in Sets of K Consecutive Numbers	53.20%	Medium
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	60.90%	Medium
484	Find Permutation	60.30%	Medium
1046	Last Stone Weight	62.20%	Easy
1386	Cinema Seat Allocation	34.70%	Medium

Dynamic Programming

#	Title	Acceptance	Difficulty
5	Longest Palindromic Substring	29.30%	Medium
53	Maximum Subarray	46.40%	Easy
121	Best Time to Buy and Sell Stock	50.30%	Easy
85	Maximal Rectangle	37.40%	Hard
10	Regular Expression Matching	26.70%	Hard
312	Burst Balloons	51.40%	Hard
96	Unique Binary Search Trees	52.50%	Medium
70	Climbing Stairs	47.10%	Easy
198	House Robber	41.90%	Easy
139	Word Break	39.80%	Medium
72	Edit Distance	44.40%	Hard
1130	Minimum Cost Tree From Leaf Values	65.90%	Medium
152	Maximum Product Subarray	31.60%	Medium
338	Counting Bits	69.30%	Medium
279	Perfect Squares	47.10%	Medium
120	Triangle	43.80%	Medium
309	Best Time to Buy and Sell Stock with Cooldown	46.30%	Medium
64	Minimum Path Sum	54.10%	Medium
1025	Divisor Game	66.20%	Easy
32	Longest Valid Parentheses	28.20%	Hard
95	Unique Binary Search Trees II	40.30%	Medium
357	Count Numbers with Unique Digits	48.30%	Medium
123	Best Time to Buy and Sell Stock III	37.20%	Hard
303	Range Sum Query - Immutable	44.20%	Easy
62	Unique Paths	53.80%	Medium
647	Palindromic Substrings	60.40%	Medium
413	Arithmetic Slices	57.80%	Medium
1140	Stone Game II	62.80%	Medium
221	Maximal Square	37.60%	Medium
140	Word Break II	31.50%	Hard
97	Interleaving String	31.30%	Hard
91	Decode Ways	24.50%	Medium
115	Distinct Subsequences	38.00%	Hard
322	Coin Change	35.10%	Medium
410	Split Array Largest Sum	44.40%	Hard
188	Best Time to Buy and Sell Stock IV	27.90%	Hard
375	Guess Number Higher or Lower II	40.20%	Medium
343	Integer Break	50.10%	Medium
87	Scramble String	33.60%	Hard
264	Ugly Number II	41.90%	Medium
1240	Tiling a Rectangle with the Fewest Squares	49.40%	Hard
546	Remove Boxes	42.30%	Hard
300	Longest Increasing Subsequence	42.50%	Medium
363	Max Sum of Rectangle No Larger Than K	37.20%	Hard
730	Count Different Palindromic Subsequences	41.60%	Hard
698	Partition to K Equal Sum Subsets	45.00%	Medium
877	Stone Game	64.50%	Medium
741	Cherry Pickup	33.90%	Hard
746	Min Cost Climbing Stairs	50.20%	Easy
516	Longest Palindromic Subsequence	52.80%	Medium
354	Russian Doll Envelopes	35.50%	Hard
1074	Number of Submatrices That Sum to Target	59.00%	Hard
1049	Last Stone Weight II	44.00%	Medium
321	Create Maximum Number	26.90%	Hard
44	Wildcard Matching	24.60%	Hard
718	Maximum Length of Repeated Subarray	49.20%	Medium
920	Number of Music Playlists	46.40%	Hard
983	Minimum Cost For Tickets	60.10%	Medium
466	Count The Repetitions	28.20%	Hard
847	Shortest Path Visiting All Nodes	51.70%	Hard
132	Palindrome Partitioning II	30.10%	Hard
174	Dungeon Game	32.10%	Hard
1227	Airplane Seat Assignment Probability	60.50%	Medium
714	Best Time to Buy and Sell Stock with Transaction Fee	54.30%	Medium
123	Best Time to Buy and Sell Stock III	42.2%	Hard
188	Best Time to Buy and Sell Stock IV	31.9%	Hard

| 943 | Find the Shortest Superstring | 42.70% | Hard | | 304 | Range Sum Query 2D - Immutable | 38.10% | Medium | | 403 | Frog Jump | 39.50% | Hard | | 740 | Delete and Earn | 48.50% | Medium | | 1314 | Matrix Block Sum | 73.80% | Medium | | 638 | Shopping Offers | 51.30% | Medium | | 1048 | Longest String Chain | 54.50% | Medium | | 956 | Tallest Billboard | 39.60% | Hard | | 887 | Super Egg Drop | 27.10% | Hard | | 712 | Minimum ASCII Delete Sum for Two Strings | 58.40% | Medium | | 256 | Paint House | 52.00% | Easy | | 646 | Maximum Length of Pair Chain | 51.60% | Medium | | 1000 | Minimum Cost to Merge Stones | 39.50% | Hard |

Graph

#	Title	Acceptance	Difficulty
959	Regions Cut By Slashes	66.00%	Medium
1043	Partition Array for Maximum Sum	65.00%	Medium
399	Evaluate Division	51.30%	Medium
269	Alien Dictionary	33.30%	Hard
133	Clone Graph	34.20%	Medium
332	Reconstruct Itinerary	36.40%	Medium
207	Course Schedule	42.80%	Medium
765	Couples Holding Hands	54.20%	Hard
743	Network Delay Time	44.80%	Medium
210	Course Schedule II	39.70%	Medium
310	Minimum Height Trees	32.10%	Medium
996	Number of Squareful Arrays	47.80%	Hard
1042	Flower Planting With No Adjacent	48.50%	Easy
785	Is Graph Bipartite?	47.20%	Medium
802	Find Eventual Safe States	48.70%	Medium
684	Redundant Connection	57.00%	Medium
1203	Sort Items by Groups Respecting Dependencies	47.40%	Hard
685	Redundant Connection II	32.40%	Hard
928	Minimize Malware Spread II	40.40%	Hard
841	Keys and Rooms	64.10%	Medium
1168	Optimize Water Distribution in a Village	60.50%	Hard
854	K-Similar Strings	38.20%	Hard
1153	String Transforms Into Another String	35.90%	Hard
323	Number of Connected Components in an Undirected Graph	55.80%	Medium
261	Graph Valid Tree	42.00%	Medium
1267	Count Servers that Communicate	57.80%	Medium
1102	Path With Maximum Minimum Value	49.20%	Medium
1161	Maximum Level Sum of a Binary Tree	72.30%	Medium
839	Similar String Groups	38.60%	Hard
997	Find the Town Judge	50.10%	Easy
1129	Shortest Path with Alternating Colors	38.90%	Medium
1162	As Far from Land as Possible	43.20%	Medium
990	Satisfiability of Equality Equations	44.70%	Medium
1135	Connecting Cities With Minimum Cost	57.10%	Medium
1387	Sort Integers by The Power Value	70.20%	Medium
444	Sequence Reconstruction	22.00%	Medium
1306	Jump Game III	60.50%	Medium
1136	Parallel Courses	61.00%	Hard
1361	Validate Binary Tree Nodes	50.10%	Medium
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	44.10%	Medium
1494	Parallel Courses II	33.10%	Hard
1059	All Paths from Source Lead to Destination	44.80%	Medium
1462	Course Schedule IV	41.10%	Medium
1514	Path with Maximum Probability	34.50%	Medium

Note: Refer individual folder for more details.