Grind 75

Updated 75-problem list by the original Blind 75 author, with modern problem selection.

71 道題目

#	題目	難度	Rating
1	1. Two Sum	Easy	1116
2	20. Valid Parentheses	Easy	1211
3	21. Merge Two Sorted Lists	Easy	1168
4	121. Best Time to Buy and Sell Stock	Easy	1487
5	125. Valid Palindrome	Easy	1138
6	226. Invert Binary Tree	Easy	1160
7	242. Valid Anagram	Easy	1151
8	704. Binary Search	Easy	1162
9	733. Flood Fill	Easy	1139
10	235. Lowest Common Ancestor of a Binary Search Tree	Medium	1333
11	110. Balanced Binary Tree	Easy	1194
12	141. Linked List Cycle	Easy	1302
13	232. Implement Queue using Stacks	Easy	1356
14	278. First Bad Version	Easy	1161
15	383. Ransom Note	Easy	1139
16	70. Climbing Stairs	Easy	1232
17	409. Longest Palindrome	Easy	1132
18	206. Reverse Linked List	Easy	1186
19	169. Majority Element	Easy	1235
20	67. Add Binary	Easy	1160
21	543. Diameter of Binary Tree	Easy	1287
22	876. Middle of the Linked List	Easy	1168
23	104. Maximum Depth of Binary Tree	Easy	1116
24	217. Contains Duplicate	Easy	1160
25	572. Subtree of Another Tree	Easy	1377
26	53. Maximum Subarray	Medium	1409
27	57. Insert Interval	Medium	1541
28	542. 01 Matrix	Medium	1538
29	973. K Closest Points to Origin	Medium	1470
30	3. Longest Substring Without Repeating Characters	Medium	1533
31	102. Binary Tree Level Order Traversal	Medium	1308
32	133. Clone Graph	Medium	1521
33	150. Evaluate Reverse Polish Notation	Medium	1492
34	207. Course Schedule	Medium	1656
35	208. Implement Trie (Prefix Tree)	Medium	1543
36	322. Coin Change	Medium	1684
37	238. Product of Array Except Self	Medium	1480
38	155. Min Stack	Medium	1419
39	98. Validate Binary Search Tree	Medium	1490
40	200. Number of Islands	Medium	1580
41	994. Rotting Oranges	Medium	1571
42	33. Search in Rotated Sorted Array	Medium	1625
43	39. Combination Sum	Medium	1469
44	46. Permutations	Medium	1519
45	56. Merge Intervals	Medium	1551
46	236. Lowest Common Ancestor of a Binary Tree	Medium	1660
47	981. Time Based Key-Value Store	Medium	1676
48	721. Accounts Merge	Medium	1664
49	75. Sort Colors	Medium	1381
50	139. Word Break	Medium	1673
51	416. Partition Equal Subset Sum	Medium	1624
52	8. String to Integer (atoi)	Medium	1545
53	54. Spiral Matrix	Medium	1524
54	78. Subsets	Medium	1416
55	199. Binary Tree Right Side View	Medium	1454
56	5. Longest Palindromic Substring	Medium	1581
57	62. Unique Paths	Medium	1383
58	105. Construct Binary Tree from Preorder and Inorder Traversal	Medium	1643
59	198. House Robber	Medium	1514
60	438. Find All Anagrams in a String	Medium	1483
61	621. Task Scheduler	Medium	1667
62	146. LRU Cache	Medium	1793
63	230. Kth Smallest Element in a BST	Medium	1401
64	739. Daily Temperatures	Medium	1418
65	76. Minimum Window Substring	Hard	1890
66	297. Serialize and Deserialize Binary Tree	Hard	1884
67	295. Find Median from Data Stream	Hard	1973
68	300. Longest Increasing Subsequence	Medium	1666
69	191. Number of 1 Bits	Easy	1088
70	338. Counting Bits	Easy	1203
71	268. Missing Number	Easy	1114