GitHub - borisachen/leetcode

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Name		Name	Last commit message	Last commit date
Latest commit borisachen sun Nov 16, 2020 15e36b4 · Nov 16, 2020 History 162 Commits
java		java
ml		ml
second_tier_questions		second_tier_questions
001. Two Sum.py		001. Two Sum.py
003. Longest Substring Without Repeating Characters.py		003. Longest Substring Without Repeating Characters.py
005. Longest Palindromic Substring.py		005. Longest Palindromic Substring.py
011. Container With Most Water.py		011. Container With Most Water.py
015. 3Sum.py		015. 3Sum.py
016. 3Sum Closest.py		016. 3Sum Closest.py
017. Letter Combinations of a Phone Number.py		017. Letter Combinations of a Phone Number.py
019. Remove Nth Node From End of List.py		019. Remove Nth Node From End of List.py
020. Valid Parentheses.py		020. Valid Parentheses.py
021. Merge Two Sorted Lists.py		021. Merge Two Sorted Lists.py
022. Generate Parentheses.py		022. Generate Parentheses.py
023. Merge k Sorted Lists 2.py		023. Merge k Sorted Lists 2.py
023. Merge k Sorted Lists.py		023. Merge k Sorted Lists.py
0238. Product of Array Except Self.py		0238. Product of Array Except Self.py
025. Reverse Nodes in k-Group.py		025. Reverse Nodes in k-Group.py
030. Substring with Concatenation of All Words.py		030. Substring with Concatenation of All Words.py
0301. Remove Invalid Parentheses		0301. Remove Invalid Parentheses
031. Next Permutation.py		031. Next Permutation.py
039. Combination Sum.py		039. Combination Sum.py
042. Trapping Rain Water.py		042. Trapping Rain Water.py
048. Rotate Image.py		048. Rotate Image.py
053. Maximum Subarray.py		053. Maximum Subarray.py
0560. Subarray Sum Equals K.py		0560. Subarray Sum Equals K.py
057. Insert Interval Add to List.py		057. Insert Interval Add to List.py
059. Spiral Matrix II.py		059. Spiral Matrix II.py
060. Permutation Sequence.py		060. Permutation Sequence.py
061. Rotate List.py		061. Rotate List.py
063. Unique Paths II.py		063. Unique Paths II.py
064. Minimum Path Sum.py		064. Minimum Path Sum.py
067. Add Binary.py		067. Add Binary.py
070. Climbing Stairs.py		070. Climbing Stairs.py
071. Simplify Path.py		071. Simplify Path.py
072. Edit Distance.py		072. Edit Distance.py
075. Sort Colors.py		075. Sort Colors.py
076. Minimum Window Substring.py		076. Minimum Window Substring.py
077. Combinations.py		077. Combinations.py
079. Word Search.py		079. Word Search.py
080. Remove Duplicates from Sorted Array II.py		080. Remove Duplicates from Sorted Array II.py
081. Search in Rotated Sorted Array II.py		081. Search in Rotated Sorted Array II.py
082. Remove Duplicates from Sorted List II.py		082. Remove Duplicates from Sorted List II.py
083. Remove Duplicates from Sorted List.py		083. Remove Duplicates from Sorted List.py
084. Largest Rectangle in Histogram.py		084. Largest Rectangle in Histogram.py
085. Maximal Rectangle.py		085. Maximal Rectangle.py
086. Partition List.py		086. Partition List.py
089. Gray Code.py		089. Gray Code.py
091. Decode Ways.py		091. Decode Ways.py
092. Reverse Linked List II.py		092. Reverse Linked List II.py
093. Restore IP Addresses.py		093. Restore IP Addresses.py
094. Binary Tree Inorder Traversal.py		094. Binary Tree Inorder Traversal.py
095. Unique Binary Search Trees II.py		095. Unique Binary Search Trees II.py
0953. Verifying an Alien Dictionary.py		0953. Verifying an Alien Dictionary.py
096. Unique Binary Search Trees.py		096. Unique Binary Search Trees.py
098. Validate Binary Search Tree.py		098. Validate Binary Search Tree.py
099. Recover Binary Search Tree.py		099. Recover Binary Search Tree.py
100. Same Tree.py		100. Same Tree.py
1000. Minimum Cost to Merge Stones.py		1000. Minimum Cost to Merge Stones.py
1004. Max Consecutive Ones III.py		1004. Max Consecutive Ones III.py
101. Symmetric Tree.py		101. Symmetric Tree.py
1011. Capacity To Ship Packages Within D Days.py		1011. Capacity To Ship Packages Within D Days.py
1012. Numbers With Repeated Digits.py		1012. Numbers With Repeated Digits.py
1013. Partition Array Into Three Parts With Equal Sum.py		1013. Partition Array Into Three Parts With Equal Sum.py
1014. Best Sightseeing Pair.py		1014. Best Sightseeing Pair.py
1019. Next Greater Node In Linked List.py		1019. Next Greater Node In Linked List.py
102. Binary Tree Level Order Traversal.py		102. Binary Tree Level Order Traversal.py
1020. Number of Enclaves.py		1020. Number of Enclaves.py
1022. Sum of Root To Leaf Binary Numbers.py		1022. Sum of Root To Leaf Binary Numbers.py
1024. Video Stitching.py		1024. Video Stitching.py
1026. Maximum Difference Between Node and Ancestor.py		1026. Maximum Difference Between Node and Ancestor.py
1027. Longest Arithmetic Subsequence.py		1027. Longest Arithmetic Subsequence.py
1028. Recover a Tree From Preorder Traversal.py		1028. Recover a Tree From Preorder Traversal.py
1029. Two City Scheduling.py		1029. Two City Scheduling.py
103. Binary Tree Zigzag Level Order Traversal.py		103. Binary Tree Zigzag Level Order Traversal.py
104. Maximum Depth of Binary Tree.py		104. Maximum Depth of Binary Tree.py
105. Construct Binary Tree from Preorder and Inord.py		105. Construct Binary Tree from Preorder and Inord.py
106. Construct Binary Tree from Inorder and Postor.py		106. Construct Binary Tree from Inorder and Postor.py
107. Binary Tree Level Order Traversal II.py		107. Binary Tree Level Order Traversal II.py
108. Convert Sorted Array to Binary Search Tree.py		108. Convert Sorted Array to Binary Search Tree.py
109. Convert Sorted List to Binary Search Tree.py		109. Convert Sorted List to Binary Search Tree.py
110. Balanced Binary Tree.py		110. Balanced Binary Tree.py
111. Minimum Depth of Binary Tree.py		111. Minimum Depth of Binary Tree.py
112. Path Sum.py		112. Path Sum.py
113. Path Sum II.py		113. Path Sum II.py
114. Flatten Binary Tree to Linked List.py		114. Flatten Binary Tree to Linked List.py
116. Populating Next Right Pointers in Each Node.py		116. Populating Next Right Pointers in Each Node.py
117. Populating Next Right Pointers in Each Node 2.py		117. Populating Next Right Pointers in Each Node 2.py
118. Pascal's Triangle.py		118. Pascal's Triangle.py
120. Triangle.py		120. Triangle.py
121. Best Time to Buy and Sell Stock.py		121. Best Time to Buy and Sell Stock.py
122. Best Time to Buy and Sell Stock II.py		122. Best Time to Buy and Sell Stock II.py
124. Binary Tree Maximum Path Sum.py		124. Binary Tree Maximum Path Sum.py
1249. Minimum Remove to Make Valid Parentheses.py		1249. Minimum Remove to Make Valid Parentheses.py
1262. Greatest Sum Divisible by Three.py		1262. Greatest Sum Divisible by Three.py
127. Word Ladder.py		127. Word Ladder.py
129. Sum Root to Leaf Numbers.py		129. Sum Root to Leaf Numbers.py
130. Surrounded Regions.py		130. Surrounded Regions.py
131. Palindrome Partitioning.java		131. Palindrome Partitioning.java
131. Palindrome Partitioning.py		131. Palindrome Partitioning.py
133. Clone Graph.py		133. Clone Graph.py
134. Gas Station.py		134. Gas Station.py
136. Single Number.py		136. Single Number.py
138. Copy List with Random Pointer.py		138. Copy List with Random Pointer.py
139. Word Break.py		139. Word Break.py
141. Linked List Cycle.py		141. Linked List Cycle.py
142. Linked List Cycle II.py		142. Linked List Cycle II.py
143. Reorder List.py		143. Reorder List.py
144. Binary Tree Preorder Traversal.py		144. Binary Tree Preorder Traversal.py
147. Insertion Sort List.py		147. Insertion Sort List.py
150. Evaluate Reverse Polish Notation.py		150. Evaluate Reverse Polish Notation.py
152. Maximum Product Subarray.py		152. Maximum Product Subarray.py
153. Find Minimum in Rotated Sorted Array.py		153. Find Minimum in Rotated Sorted Array.py
154. Find Minimum in Rotated Sorted Array II.py		154. Find Minimum in Rotated Sorted Array II.py
155. Min Stack.py		155. Min Stack.py
157. Read N Characters Given Read4.py		157. Read N Characters Given Read4.py
159. Longest Substring with At Most Two Distinct C.py		159. Longest Substring with At Most Two Distinct C.py
160. Intersection of Two Linked Lists.py		160. Intersection of Two Linked Lists.py
161. One Edit Distance.py		161. One Edit Distance.py
163. Missing Ranges.py		163. Missing Ranges.py
165. Compare Version Numbers.py		165. Compare Version Numbers.py
167. Two Sum II - Input array is sorted.py		167. Two Sum II - Input array is sorted.py
168. Excel Sheet Column Title.py		168. Excel Sheet Column Title.py
169. Majority Element.py		169. Majority Element.py
171. Excel Sheet Column Number.py		171. Excel Sheet Column Number.py
173. Binary Search Tree Iterator.py		173. Binary Search Tree Iterator.py
179. Largest Number.py		179. Largest Number.py
187. Repeated DNA Sequences.py		187. Repeated DNA Sequences.py
198. House Robber.py		198. House Robber.py
199. Binary Tree Right Side View.py		199. Binary Tree Right Side View.py
200. Number of Islands.py		200. Number of Islands.py
201. Bitwise AND of Numbers Range.py		201. Bitwise AND of Numbers Range.py
202. Happy Number.py		202. Happy Number.py
203. Remove Linked List Elements.py		203. Remove Linked List Elements.py
205. Isomorphic Strings.py		205. Isomorphic Strings.py
206. Reverse Linked List.py		206. Reverse Linked List.py
207. Course Schedule.py		207. Course Schedule.py
208. Implement Trie (Prefix Tree).py		208. Implement Trie (Prefix Tree).py
209. Minimum Size Subarray Sum.py		209. Minimum Size Subarray Sum.py
210. Course Schedule II.py		210. Course Schedule II.py
211. Add and Search Word - Data structure design.py		211. Add and Search Word - Data structure design.py
212. Word Search II.py		212. Word Search II.py
213. House Robber II.py		213. House Robber II.py
215. Kth Largest Element in an Array.py		215. Kth Largest Element in an Array.py
216. Combination Sum III.py		216. Combination Sum III.py
219. Contains Duplicate II.py		219. Contains Duplicate II.py
220. Contains Duplicate III.py		220. Contains Duplicate III.py
221. Maximal Square.py		221. Maximal Square.py
222. Count Complete Tree Nodes.py		222. Count Complete Tree Nodes.py
226. Invert Binary Tree.py		226. Invert Binary Tree.py
228. Summary Ranges.py		228. Summary Ranges.py
229. Majority Element II.py		229. Majority Element II.py
231. Power of Two.py		231. Power of Two.py
234. Palindrome Linked List.py		234. Palindrome Linked List.py
235. Lowest Common Ancestor of a Binary Search Tree.py		235. Lowest Common Ancestor of a Binary Search Tree.py
236. Lowest Common Ancestor of a Binary Tree.py		236. Lowest Common Ancestor of a Binary Tree.py
238. Product of Array Except Self.py		238. Product of Array Except Self.py
239. Sliding Window Maximum.py		239. Sliding Window Maximum.py
240. Search a 2D Matrix II.py		240. Search a 2D Matrix II.py
241. Different Ways to Add Parentheses.py		241. Different Ways to Add Parentheses.py
242. Valid Anagram.py		242. Valid Anagram.py
246. Strobogrammatic Number.py		246. Strobogrammatic Number.py
247. Strobogrammatic Number II.py		247. Strobogrammatic Number II.py
249. Group Shifted Strings.py		249. Group Shifted Strings.py
251. Flatten 2D Vector.py		251. Flatten 2D Vector.py
252. Meeting Rooms.py		252. Meeting Rooms.py
253. Meeting Rooms II.py		253. Meeting Rooms II.py
256. Paint House.py		256. Paint House.py
257. Binary Tree Paths.py		257. Binary Tree Paths.py
259. 3Sum Smaller.py		259. 3Sum Smaller.py
261. Graph Valid Tree.py		261. Graph Valid Tree.py
264. Ugly Number II.py		264. Ugly Number II.py
265. Paint House II.py		265. Paint House II.py
266. Palindrome Permutation.py		266. Palindrome Permutation.py
269. Alien Dictionary.py		269. Alien Dictionary.py
270. Closest Binary Search Tree Value.py		270. Closest Binary Search Tree Value.py
271. Encode and Decode Strings.py		271. Encode and Decode Strings.py
272. Closest Binary Search Tree Value II.py		272. Closest Binary Search Tree Value II.py
276. Paint Fence.py		276. Paint Fence.py
277. Find the Celebrity.py		277. Find the Celebrity.py
279. Perfect Squares.py		279. Perfect Squares.py
280. Wiggle Sort.py		280. Wiggle Sort.py
281. Zigzag Iterator.py		281. Zigzag Iterator.py
283. Move Zeroes.py		283. Move Zeroes.py
285. Inorder Successor in BST.py		285. Inorder Successor in BST.py
286. Walls and Gates.py		286. Walls and Gates.py
287. Find the Duplicate Number.py		287. Find the Duplicate Number.py
288. Unique Word Abbreviation.py		288. Unique Word Abbreviation.py
290. Word Pattern.py		290. Word Pattern.py
293. Flip Game.py		293. Flip Game.py
296. Best Meeting Point.py		296. Best Meeting Point.py
298. Binary Tree Longest Consecutive Sequence.py		298. Binary Tree Longest Consecutive Sequence.py
300. Longest Increasing Subsequence.py		300. Longest Increasing Subsequence.py
301. Remove Invalid Parentheses.py		301. Remove Invalid Parentheses.py
305. Number of Islands II.py		305. Number of Islands II.py
308. Range Sum Query 2D - Mutable.py		308. Range Sum Query 2D - Mutable.py
309. Best Time to Buy and Sell Stock with Cooldown.py		309. Best Time to Buy and Sell Stock with Cooldown.py
310. Minimum Height Trees.py		310. Minimum Height Trees.py
311. Sparse Matrix Multiplication.py		311. Sparse Matrix Multiplication.py
314. Binary Tree Vertical Order Traversal.py		314. Binary Tree Vertical Order Traversal.py
315. Count of Smaller Numbers After Self.py		315. Count of Smaller Numbers After Self.py
317. Shortest Distance from All Buildings.py		317. Shortest Distance from All Buildings.py
320. Generalized Abbreviation.py		320. Generalized Abbreviation.py
322. Coin Change.py		322. Coin Change.py
324. Wiggle Sort II.py		324. Wiggle Sort II.py
325. Maximum Size Subarray Sum Equals k.py		325. Maximum Size Subarray Sum Equals k.py
328. Odd Even Linked List.py		328. Odd Even Linked List.py
329. Longest Increasing Path in a Matrix.py		329. Longest Increasing Path in a Matrix.py
334. Increasing Triplet Subsequence.py		334. Increasing Triplet Subsequence.py
337. House Robber III.py		337. House Robber III.py
340. Longest Substring with At Most K Distinct Cha.py		340. Longest Substring with At Most K Distinct Cha.py
343. Integer Break.py		343. Integer Break.py
346. Moving Average from Data Stream.py		346. Moving Average from Data Stream.py
348. Design Tic-Tac-Toe.py		348. Design Tic-Tac-Toe.py
351. Android Unlock Patterns.py		351. Android Unlock Patterns.py
357. Count Numbers with Unique Digits.py		357. Count Numbers with Unique Digits.py
359. Logger Rate Limiter.py		359. Logger Rate Limiter.py
360. Sort Transformed Array.py		360. Sort Transformed Array.py
361. Bomb Enemy.py		361. Bomb Enemy.py
362. Design Hit Counter.py		362. Design Hit Counter.py
367. Valid Perfect Square.py		367. Valid Perfect Square.py
368. Largest Divisible Subset.py		368. Largest Divisible Subset.py
376. Wiggle Subsequence.py		376. Wiggle Subsequence.py
395. Longest Substring with At Least K Repeating C.py		395. Longest Substring with At Least K Repeating C.py
399. Evaluate Division.py		399. Evaluate Division.py
406. Queue Reconstruction by Height.py		406. Queue Reconstruction by Height.py
408. Valid Word Abbreviation.py		408. Valid Word Abbreviation.py
416. Partition Equal Subset Sum.py		416. Partition Equal Subset Sum.py
418. Sentence Screen Fitting.py		418. Sentence Screen Fitting.py
480. Sliding Window Median.py		480. Sliding Window Median.py
493. Reverse Pairs.py		493. Reverse Pairs.py
494. Target Sum.py		494. Target Sum.py
531. Lonely Pixel I.py		531. Lonely Pixel I.py
540. Single Element in a Sorted Array.py		540. Single Element in a Sorted Array.py
547. Friend Circles.py		547. Friend Circles.py
556. Next Greater Element III.py		556. Next Greater Element III.py
560. Subarray Sum Equals K.py		560. Subarray Sum Equals K.py
567. Permutation in String.py		567. Permutation in String.py
583. Delete Operation for Two Strings.py		583. Delete Operation for Two Strings.py
617. Merge Two Binary Trees.py		617. Merge Two Binary Trees.py
642. Design Search Autocomplete System.py		642. Design Search Autocomplete System.py
643. Maximum Average Subarray I.py		643. Maximum Average Subarray I.py
644. Maximum Average Subarray II.py		644. Maximum Average Subarray II.py
647. Palindromic Substrings.py		647. Palindromic Substrings.py
648. Replace Words.py		648. Replace Words.py
664. Strange Printer.py		664. Strange Printer.py
673. Number of Longest Increasing Subsequence.py		673. Number of Longest Increasing Subsequence.py
677. Map Sum Pairs.py		677. Map Sum Pairs.py
678. Valid Parenthesis String.py		678. Valid Parenthesis String.py
681. Next Closest Time.py		681. Next Closest Time.py
691. Stickers to Spell Word.py		691. Stickers to Spell Word.py
718. Maximum Length of Repeated Subarray.py		718. Maximum Length of Repeated Subarray.py
737. Sentence Similarity II.py		737. Sentence Similarity II.py
750. Number Of Corner Rectangles.py		750. Number Of Corner Rectangles.py
752. Open the Lock.py		752. Open the Lock.py
784. Letter Case Permutation.py		784. Letter Case Permutation.py
842. Split Array into Fibonacci Sequence.py		842. Split Array into Fibonacci Sequence.py
929. Unique Email Addresses.py		929. Unique Email Addresses.py
930. Binary Subarrays With Sum.py		930. Binary Subarrays With Sum.py
945. Minimum Increment to Make Array Unique.py		945. Minimum Increment to Make Array Unique.py
946. Validate Stack Sequences.py		946. Validate Stack Sequences.py
947. Most Stones Removed with Same Row or Column.py		947. Most Stones Removed with Same Row or Column.py
951. Flip Equivalent Binary Trees.py		951. Flip Equivalent Binary Trees.py
954. Array of Doubled Pairs.py		954. Array of Doubled Pairs.py
955. Delete Columns to Make Sorted II.py		955. Delete Columns to Make Sorted II.py
956. Tallest Billboard.py		956. Tallest Billboard.py
958. Check Completeness of a Binary Tree.py		958. Check Completeness of a Binary Tree.py
959. Regions Cut By Slashes.py		959. Regions Cut By Slashes.py
960. Delete Columns to Make Sorted III.py		960. Delete Columns to Make Sorted III.py
962. Maximum Width Ramp.py		962. Maximum Width Ramp.py
964. Least Operators to Express Number.py		964. Least Operators to Express Number.py
965. Univalued Binary Tree.py		965. Univalued Binary Tree.py
967. Numbers With Same Consecutive Differences.py		967. Numbers With Same Consecutive Differences.py
968. Binary Tree Cameras.py		968. Binary Tree Cameras.py
973. K Closest Points to Origin.py		973. K Closest Points to Origin.py
974. Subarray Sums Divisible by K.py		974. Subarray Sums Divisible by K.py
975. Odd Even Jump.py		975. Odd Even Jump.py
979. Distribute Coins in Binary Tree.py		979. Distribute Coins in Binary Tree.py
983. Minimum Cost For Tickets.py		983. Minimum Cost For Tickets.py
986. Interval List Intersections.py		986. Interval List Intersections.py
988. Smallest String Starting From Leaf.py		988. Smallest String Starting From Leaf.py
990. Satisfiability of Equality Equations.py		990. Satisfiability of Equality Equations.py
992. Subarrays with K Different Integers.py		992. Subarrays with K Different Integers.py
996. Number of Squareful Arrays.py		996. Number of Squareful Arrays.py
LDA.txt		LDA.txt
backtrack.py		backtrack.py
count-of-range-sum.java		count-of-range-sum.java
count-of-range-sums.py		count-of-range-sums.py
count_possibilities_convert_int_to_string.py		count_possibilities_convert_int_to_string.py
countinversions.py		countinversions.py
countsmaller.py		countsmaller.py
decision_tree.py		decision_tree.py
decision_tree2.py		decision_tree2.py
foo.py		foo.py
ispalindrome.py		ispalindrome.py
kmeans.py		kmeans.py
logistic_regression.py		logistic_regression.py
mergesort.py		mergesort.py
permutations		permutations
permutations.py		permutations.py
resources.txt		resources.txt
reversepairs.py		reversepairs.py
rotate.py		rotate.py
scratch.py		scratch.py
search2dmatrix.py		search2dmatrix.py
subsets2.py		subsets2.py
union_find.py		union_find.py
untitled.py		untitled.py