README.md

List of solved problems (299)

1. 1 Two Sum https://leetcode.com/problems/two-sum/ Easy
2. 2 Add Two Numbers // https://leetcode.com/problems/add-two-numbers/ Medium
3. 5 Longest Palindromic Substring https://leetcode.com/problems/longest-palindromic-substring/ Medium
4. 7 Reverse Integer https://leetcode.com/problems/reverse-integer/ Easy
5. 8 String to Integer (atoi) https://leetcode.com/problems/string-to-integer-atoi/ Medium
6. 9 Palindrome Number https://leetcode.com/problems/palindrome-number/ Easy
7. 13 Roman to Integer https://leetcode.com/problems/roman-to-integer/ Easy
8. 15 3Sum https://leetcode.com/problems/3sum/ Medium
9. 20 Valid Parentheses https://leetcode.com/problems/valid-parentheses/ Easy
10. 21 Merge Two Sorted Lists https://leetcode.com/problems/merge-two-sorted-lists/ Easy
11. 26 Remove Duplicates from Sorted Array https://leetcode.com/problems/remove-duplicates-from-sorted-array/ Easy
12. 33 Search in Rotated Sorted Array https://leetcode.com/problems/search-in-rotated-sorted-array/ Medium
13. 35 Search Insert Position https://leetcode.com/problems/search-insert-position/ Easy
14. 36 Valid Sudoku https://leetcode.com/problems/valid-sudoku/ Medium
15. 39 Combination Sum https://leetcode.com/problems/combination-sum/ Medium
16. 40 Combination Sum II https://leetcode.com/problems/combination-sum-ii/ Medium
17. 41 First Missing Positive https://leetcode.com/problems/first-missing-positive/ Hard
18. 49 Group Anagrams https://leetcode.com/problems/group-anagrams/ Medium
19. 50 Pow(x, n) https://leetcode.com/problems/powx-n/ Medium
20. 53 Maximum Subarray https://leetcode.com/problems/maximum-subarray/ Easy
21. 55 Jump Game https://leetcode.com/problems/jump-game/ Medium
22. 56 Merge Intervals https://leetcode.com/problems/merge-intervals/ Medium
23. 57 Insert Interval https://leetcode.com/problems/insert-interval/ Hard
24. 60 Permutation Sequence https://leetcode.com/problems/permutation-sequence/ Medium
25. 61 Rotate List https://leetcode.com/problems/rotate-list/ Medium
26. 62 Unique Paths https://leetcode.com/problems/unique-paths/ Medium
27. 63 Unique Paths II https://leetcode.com/problems/unique-paths-ii/ Medium
28. 64 Minimum Path Sum https://leetcode.com/problems/minimum-path-sum/ Medium
29. 66 Plus One https://leetcode.com/problems/plus-one/ Easy
30. 67 Add Binary https://leetcode.com/problems/add-binary/ Easy
31. 70 Climbing Stairs https://leetcode.com/problems/climbing-stairs/ Easy
32. 71 Simplify Path https://leetcode.com/problems/simplify-path/ Medium
33. 72 Edit Distance https://leetcode.com/problems/edit-distance/ Hard
34. 74 Search a 2D Matrix https://leetcode.com/problems/search-a-2d-matrix/ Medium
35. 75 Sort Colors https://leetcode.com/problems/sort-colors/ Medium
36. 78 Subsets https://leetcode.com/problems/subsets/ Medium
37. 79 Word Search https://leetcode.com/problems/word-search/ Medium
38. 81 Search in Rotated Sorted Array II https://leetcode.com/problems/search-in-rotated-sorted-array-ii/ Medium
39. 88 Merge Sorted Array https://leetcode.com/problems/merge-sorted-array/ Easy
40. 91 Decode Ways https://leetcode.com/problems/decode-ways/ Medium
41. 93 Restore IP Addresses https://leetcode.com/problems/restore-ip-addresses/ Medium
42. 94 Binary Tree Inorder Traversal https://leetcode.com/problems/binary-tree-inorder-traversal/ Easy
43. 96 Unique Binary Search Trees https://leetcode.com/problems/unique-binary-search-trees/ Medium
44. 98 Validate Binary Search Tree https://leetcode.com/problems/validate-binary-search-tree/ Medium
45. 99 Recover Binary Search Tree https://leetcode.com/problems/recover-binary-search-tree/ Medium
46. 100 Same Tree https://leetcode.com/problems/same-tree/ Easy
47. 102 Binary Tree Level Order Traversal https://leetcode.com/problems/binary-tree-level-order-traversal/ Medium
48. 103 Binary Tree Zigzag Level Order Traversal https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/ Medium
49. 105 Construct Binary Tree from Preorder and Inorder Traversal https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ Medium
50. 106 Construct Binary Tree from Inorder and Postorder Traversal https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/ Medium
51. 107 Binary Tree Level Order Traversal II https://leetcode.com/problems/binary-tree-level-order-traversal-ii/ Easy
52. 111 Minimum Depth of Binary Tree https://leetcode.com/problems/minimum-depth-of-binary-tree/ Easy
53. 112 Path Sum https://leetcode.com/problems/path-sum/ Easy
54. 113 Path Sum II https://leetcode.com/problems/path-sum-ii/ Medium
55. 119 Pascal's Triangle II https://leetcode.com/problems/pascals-triangle-ii/ Easy
56. 121 Best Time to Buy and Sell Stock https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ Easy
57. 122 Best Time to Buy and Sell Stock II https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/ Easy
58. 123 Best Time to Buy and Sell Stock III https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/ Hard
59. 124 Binary Tree Maximum Path Sum https://leetcode.com/problems/binary-tree-maximum-path-sum/ Hard
60. 125 Valid Palindrome https://leetcode.com/problems/valid-palindrome/ Easy
61. 129 Sum Root to Leaf Numbers https://leetcode.com/problems/sum-root-to-leaf-numbers/ Medium
62. 130 Surrounded Regions https://leetcode.com/problems/surrounded-regions/ Medium
63. 134 Gas Station https://leetcode.com/problems/gas-station/ Medium
64. 136 Single Number https://leetcode.com/problems/single-number/ Easy
65. 137 Single Number II https://leetcode.com/problems/single-number-ii/ Medium
66. 139 Word Break https://leetcode.com/problems/word-break/ Medium
67. 140 Word Break II https://leetcode.com/problems/word-break-ii/ Hard
68. 143 Reorder List https://leetcode.com/problems/reorder-list/ Medium
69. 146 LRU Cache https://leetcode.com/problems/lru-cache/ Medium
70. 151 Reverse Words in a String https://leetcode.com/problems/reverse-words-in-a-string/ Medium
71. 152 Maximum Product Subarray https://leetcode.com/problems/maximum-product-subarray/ Medium
72. 165 Compare Version Numbers https://leetcode.com/problems/compare-version-numbers/ Medium
73. 169 Majority Element https://leetcode.com/problems/majority-element/ Easy
74. 170 Two Sum III - Data structure design https://leetcode.com/problems/two-sum-iii-data-structure-design/ Easy
75. 171 Excel Sheet Column Number https://leetcode.com/problems/excel-sheet-column-number/ Easy
76. 173 Binary Search Tree Iterator https://leetcode.com/problems/binary-search-tree-iterator/ Medium
77. 174 Dungeon Game https://leetcode.com/problems/dungeon-game/ Hard
78. 179 Largest Number https://leetcode.com/problems/largest-number/ Medium
79. 186 Reverse Words in a String II https://leetcode.com/problems/reverse-words-in-a-string-ii/ Medium
80. 187 Repeated DNA Sequences https://leetcode.com/problems/repeated-dna-sequences/ Medium
81. 189 Rotate Array https://leetcode.com/problems/rotate-array/ Medium
82. 198 House Robber https://leetcode.com/problems/house-robber/ Easy
83. 199 Binary Tree Right Side View https://leetcode.com/problems/binary-tree-right-side-view/ Medium
84. 200 Number of Islands https://leetcode.com/problems/number-of-islands/ Medium
85. 201 Bitwise AND of Numbers Range https://leetcode.com/problems/bitwise-and-of-numbers-range/ Medium
86. 202 Happy Number https://leetcode.com/problems/happy-number/ Easy
87. 203 Remove Linked List Elements https://leetcode.com/problems/remove-linked-list-elements/ Easy
88. 206 Reverse Linked List https://leetcode.com/problems/reverse-linked-list/ Easy
89. 207 Course Schedule https://leetcode.com/problems/course-schedule/ Medium
90. 208 Implement Trie (Prefix Tree) https://leetcode.com/problems/implement-trie-prefix-tree/ Medium
91. 210 Course Schedule II https://leetcode.com/problems/course-schedule-ii/ Medium
92. 211 Add and Search Word - Data structure design https://leetcode.com/problems/add-and-search-word-data-structure-design/ Medium
93. 212 Word Search II https://leetcode.com/problems/word-search-ii/ Hard
94. 213 House Robber II https://leetcode.com/problems/house-robber-ii/ Medium
95. 215 https://leetcode.com/problems/kth-largest-element-in-an-array/ Kth Largest Element in an Array Medium
96. 216 Combination Sum III https://leetcode.com/problems/combination-sum-iii/ Medium
97. 220 Contains Duplicate III https://leetcode.com/problems/contains-duplicate-iii/ Medium
98. 221 Maximal Square https://leetcode.com/problems/maximal-square/ Medium
99. 222 Count Complete Tree Nodes https://leetcode.com/problems/count-complete-tree-nodes/ Medium
100. 226 Invert Binary Tree https://leetcode.com/problems/invert-binary-tree/ Easy
101. 227 Basic Calculator II https://leetcode.com/problems/basic-calculator-ii/ Medium
102. 228 Summary Ranges https://leetcode.com/problems/summary-ranges/ Easy
103. 229 Majority Element II https://leetcode.com/problems/majority-element-ii/ Medium
104. 230 Kth Smallest Element in a BST https://leetcode.com/problems/kth-smallest-element-in-a-bst/ Medium
105. 231 Power of Two https://leetcode.com/problems/power-of-two/ Easy
106. 236 Lowest Common Ancestor of a Binary Tree https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree Medium
107. 238 Product of Array Except Self https://leetcode.com/problems/product-of-array-except-self/ Medium
108. 252 Meeting Rooms https://leetcode.com/problems/meeting-rooms/ Easy
109. 253 Meeting Rooms II https://leetcode.com/problems/meeting-rooms-ii/ Medium
110. 257 Binary Tree Paths https://leetcode.com/problems/binary-tree-paths/ Easy
111. 258 Add Digits https://leetcode.com/problems/add-digits/ Easy
112. 260 Single Number III https://leetcode.com/problems/single-number-iii/ Medium
113. 264 Ugly Number II https://leetcode.com/problems/ugly-number-ii/ Medium
114. 268 Missing Number https://leetcode.com/problems/missing-number/ Easy
115. 270 Closest Binary Search Tree Value https://leetcode.com/problems/closest-binary-search-tree-value/ Easy
116. 273 Integer to English Words https://leetcode.com/problems/integer-to-english-words/ Hard
117. 274 H-Index https://leetcode.com/problems/h-index/ Medium
118. 275 H-Index II https://leetcode.com/problems/h-index-ii/ Medium
119. 278 First Bad Version https://leetcode.com/problems/first-bad-version/ Easy
120. 279 Perfect Squares https://leetcode.com/problems/perfect-squares/ Medium
121. 283 Move Zeroes https://leetcode.com/problems/move-zeroes/ Easy
122. 287 Find the Duplicate Number https://leetcode.com/problems/find-the-duplicate-number/ Medium
123. 290 Word Pattern https://leetcode.com/problems/word-pattern/ Easy
124. 299 Bulls and Cows https://leetcode.com/problems/bulls-and-cows/ Easy
125. 300 Longest Increasing Subsequence https://leetcode.com/problems/longest-increasing-subsequence/ Medium
126. 316 Remove Duplicate Letters https://leetcode.com/problems/remove-duplicate-letters/ Medium
127. 322 Coin Change https://leetcode.com/problems/coin-change/ Medium
128. 328 Odd Even Linked List https://leetcode.com/problems/odd-even-linked-list/ Medium
129. 332 Reconstruct Itinerary https://leetcode.com/problems/reconstruct-itinerary/ Medium
130. 337 House Robber III https://leetcode.com/problems/house-robber-iii/ Medium
131. 338 Counting Bits https://leetcode.com/problems/counting-bits/ Medium
132. 342 Power of Four https://leetcode.com/problems/power-of-four/ Easy
133. 344 Reverse String https://leetcode.com/problems/reverse-string/ Easy
134. 346 Moving Average from Data Stream https://leetcode.com/problems/moving-average-from-data-stream/ Easy
135. 347 Top K Frequent Elements https://leetcode.com/problems/top-k-frequent-elements/ Medium
136. 359 Logger Rate Limiter https://leetcode.com/problems/logger-rate-limiter/ Easy
137. 367 Valid Perfect Square https://leetcode.com/problems/valid-perfect-square/ Easy
138. 368 Largest Divisible Subset https://leetcode.com/problems/largest-divisible-subset/ Medium
139. 380 Insert Delete GetRandom O(1) https://leetcode.com/problems/insert-delete-getrandom-o1/ Medium
140. 383 Ransom Note https://leetcode.com/problems/ransom-note/ Easy
141. 387 First Unique Character in a String https://leetcode.com/problems/first-unique-character-in-a-string/ Easy
142. 389 Find the Difference https://leetcode.com/problems/find-the-difference/ Easy
143. 392 Is Subsequence https://leetcode.com/problems/is-subsequence/ Easy
144. 399 Evaluate Division https://leetcode.com/problems/evaluate-division/ Medium
145. 402 Remove K Digits https://leetcode.com/problems/remove-k-digits/ Medium
146. 404 Sum of Left Leaves https://leetcode.com/problems/sum-of-left-leaves/ Easy
147. 406 Queue Reconstruction by Height https://leetcode.com/problems/queue-reconstruction-by-height/ Medium
148. 409 Longest Palindrome https://leetcode.com/problems/longest-palindrome/ Easy
149. 412 Fizz Buzz https://leetcode.com/problems/fizz-buzz/ Easy
150. 415 Add Strings https://leetcode.com/problems/add-strings/ Easy
151. 416 Partition Equal Subset Sum https://leetcode.com/problems/partition-equal-subset-sum/ Medium
152. 436 Find Right Interval https://leetcode.com/problems/find-right-interval/ Medium
153. 437 Path Sum III https://leetcode.com/problems/path-sum-iii/ Medium
154. 438 Find All Anagrams in a String https://leetcode.com/problems/find-all-anagrams-in-a-string/ Medium
155. 441 Arranging Coins https://leetcode.com/problems/arranging-coins/ Easy
156. 442 Find All Duplicates in an Array https://leetcode.com/problems/find-all-duplicates-in-an-array/ Medium
157. 443 String Compression https://leetcode.com/problems/string-compression/ Medium
158. 450 Delete Node in a BST https://leetcode.com/problems/delete-node-in-a-bst/ Medium
159. 451 Sort Characters By Frequency https://leetcode.com/problems/sort-characters-by-frequency/ Medium
160. 452 Minimum Number of Arrows to Burst Balloons https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/ Medium
161. 459 Repeated Substring Pattern // https://leetcode.com/problems/repeated-substring-pattern/ Easy
162. 461 Hamming Distance https://leetcode.com/problems/hamming-distance/ Easy
163. 463 Island Perimeter https://leetcode.com/problems/island-perimeter/ Easy
164. 468 Validate IP Address https://leetcode.com/problems/validate-ip-address/ Medium
165. 472 Concatenated Words https://leetcode.com/problems/concatenated-words/ Hard
166. 476 Number Complement https://leetcode.com/problems/number-complement/ Easy
167. 485 Max Consecutive Ones https://leetcode.com/problems/max-consecutive-ones/ Easy
168. 490 The Maze https://leetcode.com/problems/the-maze/ Easy
169. 495 Teemo Attacking https://leetcode.com/problems/teemo-attacking/ Medium
170. 518 Coin Change 2 https://leetcode.com/problems/coin-change-2/ Medium
171. 520 Detect Capital https://leetcode.com/problems/detect-capital/ Easy
172. 525 Contiguous Array https://leetcode.com/problems/contiguous-array/ Medium
173. 528 Random Pick with Weight https://leetcode.com/problems/random-pick-with-weight/ Medium
174. 532 K-diff Pairs in an Array https://leetcode.com/problems/k-diff-pairs-in-an-array/ Medium
175. 539 Minimum Time Difference https://leetcode.com/problems/minimum-time-difference/ Medium
176. 540 Single Element in a Sorted Array https://leetcode.com/problems/single-element-in-a-sorted-array/ Medium
177. 543 Diameter of Binary Tree https://leetcode.com/problems/diameter-of-binary-tree/ Easy
178. 560 Subarray Sum Equals K https://leetcode.com/problems/subarray-sum-equals-k/ Medium
179. 563 Binary Tree Tilt https://leetcode.com/problems/binary-tree-tilt/ Easy
180. 567 Permutation in String https://leetcode.com/problems/permutation-in-string/ Medium
181. 593 Valid Square https://leetcode.com/problems/valid-square/ Medium
182. 621 Task Scheduler https://leetcode.com/problems/task-scheduler/ Medium
183. 624 Maximum Distance in Arrays https://leetcode.com/problems/maximum-distance-in-arrays/ Easy
184. 662 Maximum Width of Binary Tree https://leetcode.com/problems/maximum-width-of-binary-tree/ Medium
185. 678 Valid Parenthesis String https://leetcode.com/problems/valid-parenthesis-string/ Medium
186. 680 Valid Palindrome II https://leetcode.com/problems/valid-palindrome-ii/ Easy
187. 700 Search in a Binary Search Tree https://leetcode.com/problems/search-in-a-binary-search-tree/ Easy
188. 701 Insert into a Binary Search Tree https://leetcode.com/problems/insert-into-a-binary-search-tree/ Medium
189. 704 Binary Search https://leetcode.com/problems/binary-search/ Easy
190. 705 Design HashSet https://leetcode.com/problems/design-hashset/ Easy
191. 713 Subarray Product Less Than K https://leetcode.com/problems/subarray-product-less-than-k/ Medium
192. 724 Find Pivot Index https://leetcode.com/problems/find-pivot-index/ Easy
193. 733 Flood Fill https://leetcode.com/problems/flood-fill/ Easy
194. 735 Asteroid Collision https://leetcode.com/problems/asteroid-collision/ Medium
195. 739 Daily Temperatures https://leetcode.com/problems/daily-temperatures/ Medium
196. 746 Min Cost Climbing Stairs https://leetcode.com/problems/min-cost-climbing-stairs/ Easy
197. 763 Partition Labels https://leetcode.com/problems/partition-labels/ Medium
198. 766 Toeplitz Matrix https://leetcode.com/problems/toeplitz-matrix/ Easy
199. 771 Jewels and Stones https://leetcode.com/problems/jewels-and-stones/ Easy
200. 787 Cheapest Flights Within K Stops https://leetcode.com/problems/cheapest-flights-within-k-stops/ Medium
201. 790 Domino and Tromino Tiling https://leetcode.com/problems/domino-and-tromino-tiling/ Medium
202. 797 All Paths From Source to Target https://leetcode.com/problems/all-paths-from-source-to-target/ Medium
203. 804 Unique Morse Code Words https://leetcode.com/problems/unique-morse-code-words/ Easy
204. 824 Goat Latin https://leetcode.com/problems/goat-latin/ Easy
205. 832 Flipping an Image https://leetcode.com/problems/flipping-an-image/ Easy
206. 844 Backspace String Compare https://leetcode.com/problems/backspace-string-compare/ Easy
207. 849 Maximize Distance to Closest Person https://leetcode.com/problems/maximize-distance-to-closest-person/ Easy
208. 859 Buddy Strings https://leetcode.com/problems/buddy-strings/ Easy
209. 876 Middle of the Linked List https://leetcode.com/problems/middle-of-the-linked-list/ Easy
210. 886 Possible Bipartition https://leetcode.com/problems/possible-bipartition/ Medium
211. 889 Construct Binary Tree from Preorder and Postorder Traversal https://leetcode.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal/ Medium
212. 901 Online Stock Span https://leetcode.com/problems/online-stock-span/ Medium
213. 905 Sort Array By Parity https://leetcode.com/problems/sort-array-by-parity/ Easy
214. 918 Maximum Sum Circular Subarray https://leetcode.com/problems/maximum-sum-circular-subarray/ Medium
215. 933 Number of Recent Calls https://leetcode.com/problems/number-of-recent-calls/ Easy
216. 937 Reorder Data in Log Files https://leetcode.com/problems/reorder-data-in-log-files/ Easy
217. 938 Range Sum of BST https://leetcode.com/problems/range-sum-of-bst/ Easy
218. 949 Largest Time for Given Digits https://leetcode.com/problems/largest-time-for-given-digits/ Easy
219. 957 Prison Cells After N Days https://leetcode.com/problems/prison-cells-after-n-days/ Medium
220. 973 K Closest Points to Origin https://leetcode.com/problems/k-closest-points-to-origin/ Medium
221. 977 Squares of a Sorted Array https://leetcode.com/problems/squares-of-a-sorted-array/ Easy
222. 980 Unique Paths III https://leetcode.com/problems/unique-paths-iii/ Hard
223. 986 Interval List Intersections https://leetcode.com/problems/interval-list-intersections/ Medium
224. 987 Vertical Order Traversal of a Binary Tree https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree/ Medium
225. 993 Cousins in Binary Tree https://leetcode.com/problems/cousins-in-binary-tree/ Easy
226. 994 Rotting Oranges https://leetcode.com/problems/rotting-oranges/ Medium
227. 997 Find the Town Judge https://leetcode.com/problems/find-the-town-judge/ Easy
228. 1008 Construct Binary Search Tree from Preorder Traversal https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/ Medium
229. 1015 Smallest Integer Divisible by K https://leetcode.com/problems/smallest-integer-divisible-by-k/ Medium
230. 1022 Sum of Root To Leaf Binary Numbers https://leetcode.com/problems/sum-of-root-to-leaf-binary-numbers/ Easy
231. 1026 Maximum Difference Between Node and Ancestor https://leetcode.com/problems/maximum-difference-between-node-and-ancestor/ Medium
232. 1029 Two City Scheduling https://leetcode.com/problems/two-city-scheduling/ Easy
233. 1032 Stream of Characters https://leetcode.com/problems/stream-of-characters/ Hard
234. 1035 Uncrossed Lines https://leetcode.com/problems/uncrossed-lines/ Medium
235. 1041 Robot Bounded In Circle https://leetcode.com/problems/robot-bounded-in-circle/ Medium
236. 1044 Longest Duplicate Substring https://leetcode.com/problems/longest-duplicate-substring/ Hard
237. 1046 Last Stone Weight https://leetcode.com/problems/last-stone-weight/ Easy
238. 1047 Remove All Adjacent Duplicates In String https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string/ Easy
239. 1089 Duplicate Zeros https://leetcode.com/problems/duplicate-zeros/ Easy
240. 1091 Shortest Path in Binary Matrix https://leetcode.com/problems/shortest-path-in-binary-matrix/ Medium
241. 1094 Car Pooling https://leetcode.com/problems/car-pooling/ Medium
242. 1099 Two Sum Less Than K https://leetcode.com/problems/two-sum-less-than-k/ Easy
243. 1108 Defanging an IP Address https://leetcode.com/problems/defanging-an-ip-address/ Easy
244. 1143 Longest Common Subsequence https://leetcode.com/problems/longest-common-subsequence/ Medium
245. 1146 Snapshot Array https://leetcode.com/problems/snapshot-array/ Medium
246. 1198 Find Smallest Common Element in All Rows https://leetcode.com/problems/find-smallest-common-element-in-all-rows/ Medium
247. 1200 Minimum Absolute Difference https://leetcode.com/problems/minimum-absolute-difference/ Easy
248. 1209 Remove All Adjacent Duplicates in String II https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/ Medium
249. 1217 Minimum Cost to Move Chips to The Same Position https://leetcode.com/problems/minimum-cost-to-move-chips-to-the-same-position/ Easy
250. 1232 Check If It Is a Straight Line https://leetcode.com/problems/check-if-it-is-a-straight-line/ Easy
251. 1268 Search Suggestions System https://leetcode.com/problems/search-suggestions-system/ Medium
252. 1272 Remove Interval https://leetcode.com/problems/remove-interval/ Medium
253. 1277 Count Square Submatrices with All Ones https://leetcode.com/problems/count-square-submatrices-with-all-ones/ Medium
254. 1288 Remove Covered Intervals https://leetcode.com/problems/remove-covered-intervals/ Medium
255. 1291 Sequential Digits https://leetcode.com/problems/sequential-digits/ Medium
256. 1290 Convert Binary Number in a Linked List to Integer Easy
257. 1295 Find Numbers with Even Number of Digits https://leetcode.com/problems/find-numbers-with-even-number-of-digits/ Easy
258. 1306 Jump Game III https://leetcode.com/problems/jump-game-iii/ Medium
259. 1325 Delete Leaves With a Given Value https://leetcode.com/problems/delete-leaves-with-a-given-value/ Medium
260. 1342 Number of Steps to Reduce a Number to Zero https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero/ Easy
261. 1344 Angle Between Hands of a Clock https://leetcode.com/problems/angle-between-hands-of-a-clock/ Medium
262. 1423 Maximum Points You Can Obtain from Cards https://leetcode.com/problems/maximum-points-you-can-obtain-from-cards/ Medium
263. 1424 Diagonal Traverse II https://leetcode.com/problems/diagonal-traverse-ii/ Medium
264. 1426 Counting Elements https://leetcode.com/problems/counting-elements/ Easy
265. 1427 Perform String Shifts https://leetcode.com/problems/perform-string-shifts/ Easy
266. 1429 First Unique Number https://leetcode.com/problems/first-unique-number/ Medium
267. 1430 Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree https://leetcode.com/problems/check-if-a-string-is-a-valid-sequence-from-root-to-leaves-path-in-a-binary-tree/ Medium
268. 1446 Consecutive Characters https://leetcode.com/problems/consecutive-characters/ Easy
269. 1448 Count Good Nodes in Binary Tree https://leetcode.com/problems/count-good-nodes-in-binary-tree/ Medium
270. 1465 Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts https://leetcode.com/problems/maximum-area-of-a-piece-of-cake-after-horizontal-and-vertical-cuts/ Medium
271. 1510 Stone Game IV https://leetcode.com/problems/stone-game-iv/ Hard
272. 1588 Sum of All Odd Length Subarrays https://leetcode.com/problems/sum-of-all-odd-length-subarrays/ Easy
273. 1710 Maximum Units on a Truck https://leetcode.com/problems/maximum-units-on-a-truck/ Easy
274. 1991 Find the Middle Index in Array https://leetcode.com/problems/find-the-middle-index-in-array/submissions/ Easy
275. 2062 Count Vowel Substrings of a String https://leetcode.com/problems/count-vowel-substrings-of-a-string/ Easy
276. 2063 Vowels of All Substrings https://leetcode.com/problems/vowels-of-all-substrings/ Medium
277. 2064 Minimized Maximum of Products Distributed to Any Store https://leetcode.com/problems/minimized-maximum-of-products-distributed-to-any-store/ Medium
278. 2065 Maximum Path Quality of a Graph https://leetcode.com/problems/maximum-path-quality-of-a-graph/ Hard
279. 2073 Time Needed to Buy Tickets https://leetcode.com/problems/time-needed-to-buy-tickets/ Easy
280. 2078 Two Furthest Houses With Different Colors https://leetcode.com/problems/two-furthest-houses-with-different-colors/ Easy
281. 2079 Watering Plants https://leetcode.com/problems/watering-plants/ Easy
282. 2080 Range Frequency Queries https://leetcode.com/problems/range-frequency-queries/ Medium
283. 2089 Find Target Indices After Sorting Array https://leetcode.com/problems/find-target-indices-after-sorting-array/ Easy
284. 2090 K Radius Subarray Averages https://leetcode.com/problems/k-radius-subarray-averages/ Medium
285. 2091 Removing Minimum and Maximum From Array https://leetcode.com/problems/removing-minimum-and-maximum-from-array/ Medium
286. 2092 Find All People With Secret https://leetcode.com/problems/find-all-people-with-secret/ Hard
287. 2094 Finding 3-Digit Even Numbers https://leetcode.com/problems/finding-3-digit-even-numbers/ Easy
288. 2103 Rings and Rods https://leetcode.com/problems/rings-and-rods/ Easy
289. 2104 Sum of Subarray Ranges https://leetcode.com/problems/sum-of-subarray-ranges/ Medium
290. 2105 Watering Plants II https://leetcode.com/problems/watering-plants-ii/ Medium
291. 2108 Find First Palindromic String in the Array https://leetcode.com/problems/find-first-palindromic-string-in-the-array/ Easy
292. 2109 Adding Spaces to a String https://leetcode.com/problems/adding-spaces-to-a-string/ Easy
293. 2110 Number of Smooth Descent Periods of a Stock https://leetcode.com/problems/number-of-smooth-descent-periods-of-a-stock/ Medium
294. 2111 Minimum Operations to Make the Array K-Increasing https://leetcode.com/problems/minimum-operations-to-make-the-array-k-increasing/ Hard
295. 2119 A Number After a Double Reversal https://leetcode.com/problems/a-number-after-a-double-reversal/ Easy
296. 2121 Intervals Between Identical Elements https://leetcode.com/problems/intervals-between-identical-elements/ Medium
297. 2169 Count Operations to Obtain Zero https://leetcode.com/problems/count-operations-to-obtain-zero/ Easy
298. 2170 Minimum Operations to Make the Array Alternating https://leetcode.com/problems/minimum-operations-to-make-the-array-alternating/ Medium
299. 2182 Construct String With Repeat Limit https://leetcode.com/problems/construct-string-with-repeat-limit/ Medium