HackerRank Software Engineer Prep Kit

共 53 道题。Easy 24 道，Medium 19 道，Hard 10 道。

Easy（已完成 24/24）

1. 1. Count Elements Greater Than Previous Average - 题目
2. 2. Find the Smallest Missing Positive Integer - 题目
3. 3. Check Palindrome by Filtering Non-Letters - 题目
4. 4. Check for Non-Identical String Rotation - 题目
5. 5. Target Index Search - 题目
6. 6. Find First Occurrence - 题目
7. 7. Maximum Number of Non-Overlapping Intervals - 题目
8. 8. Validate Properly Nested Brackets - 题目
9. 9. Min-Tracking Stack Implementation - 题目
10. 10. One-Pass Removal of k-th Node from End - 题目
11. 11. Count Number Pairs - 题目
12. 12. Remove Consecutive Duplicates from Sorted Linked List - 题目
13. 13. Generate Valid Angle Bracket Sequences - 题目
14. 14. Remove Elements Within K Distance - 题目
15. 15. Two Sum - 题目
16. 16. Check Valid Anagram - 题目
17. 17. Lexicographical Letter Combinations of Phone Digits - 题目
18. 18. Place N Cameras Without Conflict on Blocked Grid - 题目
19. 19. Custom Fibonacci Sequence - 题目
20. 20. Ways to Fill Slots with Single or Double Coverage - 题目
21. 21. Count Connected Components in Network - 题目
22. 22. Height of Binary Search Tree - 题目
23. 23. Compare BSTs for Equal Values but Different Structure - 题目
24. 24. Detect Cycle in Module Dependency Graph - 题目

Medium（已完成 3/19）

25. Merge and Sort Intervals - 题目
26. Longest Arithmetic Subsequence with Given Difference - 题目
27. Pivoted Search - 题目
28. Find Peak Element in Bitonic Array - 题目
29. Max Unique Substring Length in a Session - 题目
30. Task Scheduler with Cooldown and Multiple Machines - 题目
31. Next Greater Element with Position Offset - 题目
32. Zero-Sum Triplets within Sliding Window - 题目
33. Maximize Revenue from Video Streams with Bandwidth Limit - 题目
34. Reverse Even-Indexed Nodes and Append - 题目
35. Longest Alternating Binary Substring with Limited Flips - 题目
36. Find Index Combinations with Target Weight Sum - 题目
37. Minimum Plans to Reach Target Bandwidth - 题目
38. Longest Increasing Subsequence Length - 题目
39. Top K Frequent Events with Order Preservation - 题目
40. Peak Concurrent Sessions per User Group - 题目
41. Queue from Two Stacks - 题目
42. Shortest Path with Processing Delays at Nodes - 题目
43. Min Spanning Tree with One Free Edge - 题目

Hard（已完成 1/10）

44. Subarrays with Given Sum and Bounded Maximum - 题目
45. Median of Two Circularly Sorted Logs - 题目
46. Maximize Profit with Task Deadlines and Multiple Servers - 题目
47. Max Area Under Histogram After Removing One Bar - 题目
48. Smallest Substring Containing All Patterns - 题目
49. Minimize Task Cancellations to Avoid Server Overlaps - 题目
50. Counting Stable Performance Intervals - 题目
51. Solve Diagonal Sudoku with 3x3 Blocks - 题目
52. Min Cost to Convert String Arrays with Edit Distance - 题目
53. Priority-Aware LRU Cache - 题目