Amazon Top 30

30 most frequently asked problems at Amazon interviews.

30 道題目

#	題目	難度	Rating
1	1. Two Sum	Easy	1116
2	2. Add Two Numbers	Medium	1395
3	3. Longest Substring Without Repeating Characters	Medium	1533
4	5. Longest Palindromic Substring	Medium	1581
5	15. 3Sum	Medium	1711
6	17. Letter Combinations of a Phone Number	Medium	1460
7	20. Valid Parentheses	Easy	1211
8	21. Merge Two Sorted Lists	Easy	1168
9	23. Merge K Sorted Lists	Hard	1893
10	42. Trapping Rain Water	Hard	2062
11	49. Group Anagrams	Medium	1474
12	53. Maximum Subarray	Medium	1409
13	56. Merge Intervals	Medium	1551
14	76. Minimum Window Substring	Hard	1890
15	98. Validate Binary Search Tree	Medium	1490
16	102. Binary Tree Level Order Traversal	Medium	1308
17	121. Best Time to Buy and Sell Stock	Easy	1487
18	128. Longest Consecutive Sequence	Medium	1680
19	138. Copy List with Random Pointer	Medium	1618
20	139. Word Break	Medium	1673
21	146. LRU Cache	Medium	1793
22	200. Number of Islands	Medium	1580
23	206. Reverse Linked List	Easy	1186
24	207. Course Schedule	Medium	1656
25	238. Product of Array Except Self	Medium	1480
26	253. Meeting Rooms II	Medium	1582
27	295. Find Median from Data Stream	Hard	1973
28	322. Coin Change	Medium	1684
29	347. Top K Frequent Elements	Medium	1540
30	560. Subarray Sum Equals K	Medium	1621