LeetCode Top Interview 150

Official LeetCode curated 150 problems for interview preparation.

148 道題目

#	題目	難度	Rating
1	88. Merge Sorted Array	Easy	1165
2	27. Remove Element	Easy	1153
3	26. Remove Duplicates from Sorted Array	Easy	1169
4	80. Remove Duplicates from Sorted Array II	Medium	1381
5	169. Majority Element	Easy	1235
6	189. Rotate Array	Medium	1433
7	121. Best Time to Buy and Sell Stock	Easy	1487
8	122. Best Time to Buy and Sell Stock II	Medium	1486
9	55. Jump Game	Medium	1565
10	45. Jump Game II	Medium	1618
11	274. H-Index	Medium	1405
12	380. Insert Delete GetRandom O(1)	Medium	1571
13	238. Product of Array Except Self	Medium	1480
14	134. Gas Station	Medium	1767
15	135. Candy	Hard	1750
16	42. Trapping Rain Water	Hard	2062
17	13. Roman to Integer	Easy	1258
18	12. Integer to Roman	Medium	1433
19	58. Length of Last Word	Easy	1156
20	14. Longest Common Prefix	Easy	1170
21	151. Reverse Words in a String	Medium	1384
22	6. Zigzag Conversion	Medium	1568
23	28. Find the Index of the First Occurrence in a String	Easy	1302
24	68. Text Justification	Hard	1657
25	125. Valid Palindrome	Easy	1138
26	392. Is Subsequence	Easy	1282
27	167. Two Sum II - Input Array Is Sorted	Medium	1389
28	11. Container With Most Water	Medium	1704
29	15. 3Sum	Medium	1711
30	209. Minimum Size Subarray Sum	Medium	1445
31	3. Longest Substring Without Repeating Characters	Medium	1533
32	30. Substring with Concatenation of All Words	Hard	2039
33	76. Minimum Window Substring	Hard	1890
34	36. Valid Sudoku	Medium	1422
35	54. Spiral Matrix	Medium	1524
36	48. Rotate Image	Medium	1407
37	73. Set Matrix Zeroes	Medium	1390
38	289. Game of Life	Medium	1529
39	383. Ransom Note	Easy	1139
40	205. Isomorphic Strings	Easy	1262
41	290. Word Pattern	Easy	1294
42	242. Valid Anagram	Easy	1151
43	49. Group Anagrams	Medium	1474
44	1. Two Sum	Easy	1116
45	202. Happy Number	Easy	1188
46	219. Contains Duplicate II	Easy	1320
47	128. Longest Consecutive Sequence	Medium	1680
48	228. Summary Ranges	Easy	1192
49	56. Merge Intervals	Medium	1551
50	57. Insert Interval	Medium	1541
51	452. Minimum Number of Arrows to Burst Balloons	Medium	1703
52	20. Valid Parentheses	Easy	1211
53	71. Simplify Path	Medium	1532
54	155. Min Stack	Medium	1419
55	150. Evaluate Reverse Polish Notation	Medium	1492
56	224. Basic Calculator	Hard	2010
57	141. Linked List Cycle	Easy	1302
58	2. Add Two Numbers	Medium	1395
59	21. Merge Two Sorted Lists	Easy	1168
60	138. Copy List with Random Pointer	Medium	1618
61	92. Reverse Linked List II	Medium	1559
62	61. Rotate List	Medium	1558
63	82. Remove Duplicates from Sorted List II	Medium	1509
64	86. Partition List	Medium	1519
65	23. Merge K Sorted Lists	Hard	1893
66	25. Reverse Nodes in k-Group	Hard	2011
67	104. Maximum Depth of Binary Tree	Easy	1116
68	100. Same Tree	Easy	1176
69	226. Invert Binary Tree	Easy	1160
70	101. Symmetric Tree	Easy	1200
71	105. Construct Binary Tree from Preorder and Inorder Traversal	Medium	1643
72	106. Construct Binary Tree from Inorder and Postorder Traversal	Medium	1660
73	117. Populating Next Right Pointers in Each Node II	Medium	1628
74	114. Flatten Binary Tree to Linked List	Medium	1519
75	112. Path Sum	Easy	1181
76	129. Sum Root to Leaf Numbers	Medium	1399
77	124. Binary Tree Maximum Path Sum	Hard	1807
78	173. Binary Search Tree Iterator	Medium	1569
79	222. Count Complete Tree Nodes	Easy	1375
80	236. Lowest Common Ancestor of a Binary Tree	Medium	1660
81	637. Average of Levels in Binary Tree	Easy	1186
82	102. Binary Tree Level Order Traversal	Medium	1308
83	103. Binary Tree Zigzag Level Order Traversal	Medium	1576
84	530. Minimum Absolute Difference in BST	Easy	1207
85	230. Kth Smallest Element in a BST	Medium	1401
86	98. Validate Binary Search Tree	Medium	1490
87	200. Number of Islands	Medium	1580
88	130. Surrounded Regions	Medium	1706
89	133. Clone Graph	Medium	1521
90	399. Evaluate Division	Medium	1747
91	207. Course Schedule	Medium	1656
92	210. Course Schedule II	Medium	1681
93	909. Snakes and Ladders	Medium	1962
94	433. Minimum Genetic Mutation	Medium	1671
95	127. Word Ladder	Hard	2061
96	208. Implement Trie (Prefix Tree)	Medium	1543
97	211. Design Add and Search Words Data Structure	Medium	1758
98	212. Word Search II	Hard	1976
99	17. Letter Combinations of a Phone Number	Medium	1460
100	77. Combinations	Medium	1483
101	46. Permutations	Medium	1519
102	39. Combination Sum	Medium	1469
103	52. N-Queens II	Hard	1843
104	22. Generate Parentheses	Medium	1648
105	79. Word Search	Medium	1700
106	108. Convert Sorted Array to Binary Search Tree	Easy	1281
107	148. Sort List	Medium	1636
108	427. Construct Quad Tree	Medium	1464
109	53. Maximum Subarray	Medium	1409
110	918. Maximum Sum Circular Subarray	Medium	1777
111	35. Search Insert Position	Easy	1164
112	74. Search a 2D Matrix	Medium	1478
113	162. Find Peak Element	Medium	1536
114	33. Search in Rotated Sorted Array	Medium	1625
115	34. Find First and Last Position of Element in Sorted Array	Medium	1483
116	153. Find Minimum in Rotated Sorted Array	Medium	1485
117	4. Median of Two Sorted Arrays	Hard	2028
118	215. Kth Largest Element in an Array	Medium	1508
119	502. IPO	Hard	2099
120	373. Find K Pairs with Smallest Sums	Medium	1710
121	295. Find Median from Data Stream	Hard	1973
122	67. Add Binary	Easy	1160
123	190. Reverse Bits	Easy	1149
124	191. Number of 1 Bits	Easy	1088
125	136. Single Number	Easy	1150
126	137. Single Number II	Medium	1710
127	201. Bitwise AND of Numbers Range	Medium	1604
128	9. Palindrome Number	Easy	1168
129	66. Plus One	Easy	1151
130	172. Factorial Trailing Zeroes	Medium	1399
131	69. Sqrt(x)	Easy	1178
132	50. Pow(x, n)	Medium	1460
133	149. Max Points on a Line	Hard	1978
134	70. Climbing Stairs	Easy	1232
135	198. House Robber	Medium	1514
136	139. Word Break	Medium	1673
137	322. Coin Change	Medium	1684
138	300. Longest Increasing Subsequence	Medium	1666
139	120. Triangle	Medium	1533
140	64. Minimum Path Sum	Medium	1444
141	63. Unique Paths II	Medium	1400
142	5. Longest Palindromic Substring	Medium	1581
143	97. Interleaving String	Medium	1785
144	72. Edit Distance	Medium	1703
145	123. Best Time to Buy and Sell Stock III	Hard	1977
146	188. Best Time to Buy and Sell Stock IV	Hard	2037
147	221. Maximal Square	Medium	1638
148	1143. Longest Common Subsequence	Medium	1727