Blind 75

The classic 75 LeetCode problems curated for interview preparation.

75 道題目

#	題目	難度	Rating
1	1. Two Sum	Easy	1116
2	121. Best Time to Buy and Sell Stock	Easy	1487
3	217. Contains Duplicate	Easy	1160
4	238. Product of Array Except Self	Medium	1480
5	53. Maximum Subarray	Medium	1409
6	152. Maximum Product Subarray	Medium	1555
7	153. Find Minimum in Rotated Sorted Array	Medium	1485
8	33. Search in Rotated Sorted Array	Medium	1625
9	15. 3Sum	Medium	1711
10	11. Container With Most Water	Medium	1704
11	371. Sum of Two Integers	Medium	1564
12	191. Number of 1 Bits	Easy	1088
13	338. Counting Bits	Easy	1203
14	268. Missing Number	Easy	1114
15	190. Reverse Bits	Easy	1149
16	70. Climbing Stairs	Easy	1232
17	322. Coin Change	Medium	1684
18	300. Longest Increasing Subsequence	Medium	1666
19	1143. Longest Common Subsequence	Medium	1727
20	139. Word Break	Medium	1673
21	377. Combination Sum IV	Medium	1609
22	198. House Robber	Medium	1514
23	213. House Robber II	Medium	1608
24	91. Decode Ways	Medium	1635
25	62. Unique Paths	Medium	1383
26	55. Jump Game	Medium	1565
27	133. Clone Graph	Medium	1521
28	207. Course Schedule	Medium	1656
29	417. Pacific Atlantic Water Flow	Medium	1707
30	200. Number of Islands	Medium	1580
31	128. Longest Consecutive Sequence	Medium	1680
32	269. Alien Dictionary	Hard	1930
33	261. Graph Valid Tree	Medium	1620
34	323. Number of Connected Components in an Undirected Graph	Medium	1558
35	57. Insert Interval	Medium	1541
36	56. Merge Intervals	Medium	1551
37	435. Non-overlapping Intervals	Medium	1567
38	252. Meeting Rooms	Easy	1163
39	253. Meeting Rooms II	Medium	1582
40	206. Reverse Linked List	Easy	1186
41	141. Linked List Cycle	Easy	1302
42	21. Merge Two Sorted Lists	Easy	1168
43	23. Merge K Sorted Lists	Hard	1893
44	19. Remove Nth Node From End of List	Medium	1474
45	143. Reorder List	Medium	1532
46	73. Set Matrix Zeroes	Medium	1390
47	54. Spiral Matrix	Medium	1524
48	48. Rotate Image	Medium	1407
49	79. Word Search	Medium	1700
50	3. Longest Substring Without Repeating Characters	Medium	1533
51	424. Longest Repeating Character Replacement	Medium	1680
52	76. Minimum Window Substring	Hard	1890
53	242. Valid Anagram	Easy	1151
54	49. Group Anagrams	Medium	1474
55	20. Valid Parentheses	Easy	1211
56	125. Valid Palindrome	Easy	1138
57	5. Longest Palindromic Substring	Medium	1581
58	647. Palindromic Substrings	Medium	1525
59	271. Encode and Decode Strings	Medium	1530
60	104. Maximum Depth of Binary Tree	Easy	1116
61	100. Same Tree	Easy	1176
62	226. Invert Binary Tree	Easy	1160
63	124. Binary Tree Maximum Path Sum	Hard	1807
64	102. Binary Tree Level Order Traversal	Medium	1308
65	297. Serialize and Deserialize Binary Tree	Hard	1884
66	572. Subtree of Another Tree	Easy	1377
67	105. Construct Binary Tree from Preorder and Inorder Traversal	Medium	1643
68	98. Validate Binary Search Tree	Medium	1490
69	230. Kth Smallest Element in a BST	Medium	1401
70	235. Lowest Common Ancestor of a Binary Search Tree	Medium	1333
71	208. Implement Trie (Prefix Tree)	Medium	1543
72	211. Design Add and Search Words Data Structure	Medium	1758
73	212. Word Search II	Hard	1976
74	347. Top K Frequent Elements	Medium	1540
75	295. Find Median from Data Stream	Hard	1973