NeetCode 150

Comprehensive 150 problems covering all major patterns for coding interviews.

150 道題目

#	題目	難度	Rating
1	217. Contains Duplicate	Easy	1160
2	242. Valid Anagram	Easy	1151
3	1. Two Sum	Easy	1116
4	49. Group Anagrams	Medium	1474
5	347. Top K Frequent Elements	Medium	1540
6	238. Product of Array Except Self	Medium	1480
7	36. Valid Sudoku	Medium	1422
8	271. Encode and Decode Strings	Medium	1530
9	128. Longest Consecutive Sequence	Medium	1680
10	125. Valid Palindrome	Easy	1138
11	167. Two Sum II - Input Array Is Sorted	Medium	1389
12	15. 3Sum	Medium	1711
13	11. Container With Most Water	Medium	1704
14	42. Trapping Rain Water	Hard	2062
15	121. Best Time to Buy and Sell Stock	Easy	1487
16	3. Longest Substring Without Repeating Characters	Medium	1533
17	424. Longest Repeating Character Replacement	Medium	1680
18	567. Permutation in String	Medium	1584
19	76. Minimum Window Substring	Hard	1890
20	239. Sliding Window Maximum	Hard	1860
21	20. Valid Parentheses	Easy	1211
22	155. Min Stack	Medium	1419
23	150. Evaluate Reverse Polish Notation	Medium	1492
24	22. Generate Parentheses	Medium	1648
25	739. Daily Temperatures	Medium	1418
26	853. Car Fleet	Medium	1740
27	84. Largest Rectangle in Histogram	Hard	1949
28	153. Find Minimum in Rotated Sorted Array	Medium	1485
29	33. Search in Rotated Sorted Array	Medium	1625
30	74. Search a 2D Matrix	Medium	1478
31	875. Koko Eating Bananas	Medium	1765
32	4. Median of Two Sorted Arrays	Hard	2028
33	981. Time Based Key-Value Store	Medium	1676
34	1011. Capacity To Ship Packages Within D Days	Medium	1725
35	206. Reverse Linked List	Easy	1186
36	21. Merge Two Sorted Lists	Easy	1168
37	141. Linked List Cycle	Easy	1302
38	143. Reorder List	Medium	1532
39	19. Remove Nth Node From End of List	Medium	1474
40	138. Copy List with Random Pointer	Medium	1618
41	2. Add Two Numbers	Medium	1395
42	287. Find the Duplicate Number	Medium	1689
43	146. LRU Cache	Medium	1793
44	23. Merge K Sorted Lists	Hard	1893
45	92. Reverse Linked List II	Medium	1559
46	226. Invert Binary Tree	Easy	1160
47	104. Maximum Depth of Binary Tree	Easy	1116
48	543. Diameter of Binary Tree	Easy	1287
49	110. Balanced Binary Tree	Easy	1194
50	100. Same Tree	Easy	1176
51	572. Subtree of Another Tree	Easy	1377
52	102. Binary Tree Level Order Traversal	Medium	1308
53	199. Binary Tree Right Side View	Medium	1454
54	1448. Count Good Nodes in Binary Tree	Medium	1438
55	98. Validate Binary Search Tree	Medium	1490
56	230. Kth Smallest Element in a BST	Medium	1401
57	105. Construct Binary Tree from Preorder and Inorder Traversal	Medium	1643
58	124. Binary Tree Maximum Path Sum	Hard	1807
59	297. Serialize and Deserialize Binary Tree	Hard	1884
60	236. Lowest Common Ancestor of a Binary Tree	Medium	1660
61	208. Implement Trie (Prefix Tree)	Medium	1543
62	211. Design Add and Search Words Data Structure	Medium	1758
63	212. Word Search II	Hard	1976
64	703. Kth Largest Element in a Stream	Easy	1360
65	1046. Last Stone Weight	Easy	1172
66	973. K Closest Points to Origin	Medium	1470
67	215. Kth Largest Element in an Array	Medium	1508
68	621. Task Scheduler	Medium	1667
69	355. Design Twitter	Medium	1479
70	295. Find Median from Data Stream	Hard	1973
71	78. Subsets	Medium	1416
72	39. Combination Sum	Medium	1469
73	46. Permutations	Medium	1519
74	90. Subsets II	Medium	1517
75	40. Combination Sum II	Medium	1562
76	79. Word Search	Medium	1700
77	131. Palindrome Partitioning	Medium	1615
78	17. Letter Combinations of a Phone Number	Medium	1460
79	51. N-Queens	Hard	1797
80	200. Number of Islands	Medium	1580
81	695. Max Area of Island	Medium	1470
82	133. Clone Graph	Medium	1521
83	286. Walls and Gates	Medium	1638
84	994. Rotting Oranges	Medium	1571
85	417. Pacific Atlantic Water Flow	Medium	1707
86	130. Surrounded Regions	Medium	1706
87	207. Course Schedule	Medium	1656
88	210. Course Schedule II	Medium	1681
89	684. Redundant Connection	Medium	1597
90	261. Graph Valid Tree	Medium	1620
91	323. Number of Connected Components in an Undirected Graph	Medium	1558
92	1091. Shortest Path in Binary Matrix	Medium	1655
93	332. Reconstruct Itinerary	Hard	1858
94	1584. Min Cost to Connect All Points	Medium	1605
95	743. Network Delay Time	Medium	1648
96	778. Swim in Rising Water	Hard	2097
97	269. Alien Dictionary	Hard	1930
98	787. Cheapest Flights Within K Stops	Medium	1786
99	70. Climbing Stairs	Easy	1232
100	746. Min Cost Climbing Stairs	Easy	1167
101	198. House Robber	Medium	1514
102	213. House Robber II	Medium	1608
103	5. Longest Palindromic Substring	Medium	1581
104	647. Palindromic Substrings	Medium	1525
105	91. Decode Ways	Medium	1635
106	322. Coin Change	Medium	1684
107	152. Maximum Product Subarray	Medium	1555
108	139. Word Break	Medium	1673
109	300. Longest Increasing Subsequence	Medium	1666
110	416. Partition Equal Subset Sum	Medium	1624
111	62. Unique Paths	Medium	1383
112	1143. Longest Common Subsequence	Medium	1727
113	309. Best Time to Buy and Sell Stock with Cooldown	Medium	1708
114	518. Coin Change II	Medium	1697
115	494. Target Sum	Medium	1679
116	97. Interleaving String	Medium	1785
117	329. Longest Increasing Path in a Matrix	Hard	1965
118	115. Distinct Subsequences	Hard	1849
119	72. Edit Distance	Medium	1703
120	312. Burst Balloons	Hard	2056
121	10. Regular Expression Matching	Hard	2025
122	53. Maximum Subarray	Medium	1409
123	55. Jump Game	Medium	1565
124	45. Jump Game II	Medium	1618
125	134. Gas Station	Medium	1767
126	846. Hand of Straights	Medium	1604
127	1899. Merge Triplets to Form Target Triplet	Medium	1635
128	763. Partition Labels	Medium	1464
129	678. Valid Parenthesis String	Medium	1700
130	57. Insert Interval	Medium	1541
131	56. Merge Intervals	Medium	1551
132	435. Non-overlapping Intervals	Medium	1567
133	252. Meeting Rooms	Easy	1163
134	253. Meeting Rooms II	Medium	1582
135	1851. Minimum Interval to Include Each Query	Hard	2286
136	48. Rotate Image	Medium	1407
137	54. Spiral Matrix	Medium	1524
138	73. Set Matrix Zeroes	Medium	1390
139	202. Happy Number	Easy	1188
140	66. Plus One	Easy	1151
141	50. Pow(x, n)	Medium	1460
142	43. Multiply Strings	Medium	1499
143	2013. Detect Squares	Medium	1678
144	191. Number of 1 Bits	Easy	1088
145	338. Counting Bits	Easy	1203
146	190. Reverse Bits	Easy	1149
147	268. Missing Number	Easy	1114
148	371. Sum of Two Integers	Medium	1564
149	7. Reverse Integer	Medium	1413
150	201. Bitwise AND of Numbers Range	Medium	1604