Pathak's DSA Bank

This is (definitely not a complete) list of interesting DSA problems I've solved.
I made this to keep track of interesting questions I solve, have all my solutions in one place for easy access, and stay consistent I guess - don't want this repo to go dead. :))

You can find questions from various sources here - I started this repository to store my solutions for Striverr's A-Z DSA Sheet (450+ questions). Soon, however, I started keeping all my solutions here, including my daily streak questions, questions from Neetcode's 150, and even Arsh Goyal's 45-Day Challenge.

Leetcode:

1. 1752 - Check if Array is Sorted and Rotated | Solution (Easy)
2. 26 - Remove Duplicates from Sorted Array | Solution (Easy)
3. 189 - Rotate Array | Solution (Medium)
4. 283 - Move Zeroes | Solution (Easy)
5. 1518 - Water Bottles | Solution (Easy)
6. 2582 - Pass the Pillow | Solution (Easy)
7. 1701 - Average Waiting Time | Solution (Medium)
8. 268 - Missing Number | Solution (Easy)
9. 1598 - Crawler Log Folder | Solution (Easy)
10. 1823 - Find the Winner of the Circular Game | Solution (Medium)
11. 217 - Contains Duplicate | Solution (Easy) (Part of Neetcode 150)
12. 1190 - Reverse Substrings Between Each Pair of Parentheses | Solution (Medium)
13. 242 - Valid Anagram | Solution (Easy) (Part of Neetcode 150)
14. 1717 - Maximum Score From Removing Substrings | Solution (Medium)
15. 2751 - Robot Collisions | Solution (Hard)
16. 726 - Number of Atoms | Solution (Hard)
17. 2196 - Create Binary Tree From Descriptions | Solution (Medium)
18. 236 - Lowest Common Ancestor Of A Binary Tree | Solution (Medium)
19. 2096 - Step-By-Step Directions From a Binary Tree Node to Another | Solution (Medium)
20. 49 - Group Anagrams | Solution (Medium) (Part of Neetcode 150)
21. 1110 - Delete Nodes And Return Forest | Solution (Medium)
22. 20 - Valid Parentheses | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
23. 28 - Find the Index of the First Occurrence in a String | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
24. 287 - Find the Duplicate Number | Solution (Medium) (Part of Arsh Goyal's 45 Day Challenge)
25. 75 - Sort Colors | Solution (Medium) (Part of Arsh Goyal's 45 Day Challenge)
26. 1530 - Number of Good Leaf Nodes Pairs | Solution (Medium)
27. 1380 - Lucky Numbers in a Matrix | Solution (Easy)
28. 1605 - Find Valid Matrix Given Row and Column Sums | Solution (Medium)
29. 2392 - Build a Matrix With Conditions | Solution (Hard)
30. 347 - Top K Frequent Elements | Solution (Medium) (Part of Neetcode 150)
31. 88 - Merge Sorted Array | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
32. 169 - Majority Element | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
33. 2418 - Sort the People | Solution (Easy)
34. 1636 - Sort Array by Increasing Frequency | Solution (Easy)
35. 1395 - Count Number of Teams | Solution (Medium)
36. 121 - Best Time to Buy and Sell Stock | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
37. 1 - Two Sum | Solution (Easy)
38. 14 - Longest Common Prefix | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
39. 680 - Valid Palindrome II | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
40. 67 - Add Binary | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
41. 168 - Excel Sheet Column Title | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
42. 232 - Implement Queue using Stacks | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
43. 844 - Backspace String Compare | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
44. 225 - Implement Stack using Queues | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
45. 496 - Next Greater Element I | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
46. 543 - Diameter of Binary Tree | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
47. 226 - Invert Binary Tree | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
48. 100 - Same Tree | Solution (Easy)
49. 572 - Subtree of Another Tree | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
50. 938 - Range Sum of BST | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
51. 101 - Symmetric Tree | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
52. 108 - Convert Sorted Array to Binary Search Tree | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
53. 617 - Merge Two Binary Trees | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
54. 104 - Maximum Depth of Binary Tree | Solution (Easy) (Part of Arsh Goyal's 45 Day Challenge)
55. 783 - Minimum Distance Between BST Nodes | Solution (Easy) (Same as LC - 530)
56. 73 - Set Matrix Zeroes | Solution (Medium)
57. 238 - Product of Array Except Self | Solution (Medium)
58. 3217 - Delete Nodes From Linked List Present in Array | Solution (Mediun)
59. 509 - Fibonacci Number | Solution (Easy)

Codechef:

1. Volume Comparison | Solution
2. Gun Master | Solution
3. c

GeeksForGeeks:

1. Union of Two Sorted Arrays | Solution
2. Chocolate Distribution Problem | Solution (Part of Arsh Goyal's 45 Day Challenge)
3. Product array puzzle | Solution (Part of Arsh Goyal's 45 Day Challenge)
4. Permutations in array | Solution (Part of Arsh Goyal's 45 Day Challenge)
5. Find Pair Given Difference | Solution (Part of Arsh Goyal's 45 Day Challenge)
6. Ceiling in a sorted array | Solution (Part of Arsh Goyal's 45 Day Challenge)
7. Deque Implementations | Solution (Part of Arsh Goyal's 45 Day Challenge)
8. Evaluation of Postfix Expression | Solution (Part of Arsh Goyal's 45 Day Challenge)
9. Implement two stacks in an array | Solution (Part of Arsh Goyal's 45 Day Challenge)
10. Check if array is sorted | Solution
11. Minimum Jumps | Solution

Some thing I'd like to do to this repository when I get time

• mention which problems belong to Striverr's A-Z DSA Sheet, just like I've mentioned (Part of Neetcode 150) or (Part of Arsh Goyal's 45-Day Challenge)
• remove questions that're from Arsh Goyal's 45 Day Challenge (i literally have a separate repo for it - here)