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January 2021 LeetCoding Challenge

Day Question Links Solutions
1. Check Array Formation Through Concatenation cpp
2. Find a Corresponding Node of a Binary Tree in a Clone of That Tree cpp
3. Beautiful Arrangement cpp
4. Merge Two Sorted Lists cpp
5. Remove Duplicates from Sorted List II cpp
6. Kth Missing Positive Number cpp
7. Longest Substring Without Repeating Characters cpp
8. Check If Two String Arrays are Equivalent cpp
9. Word Ladder cpp
10. Create Sorted Array through Instructions cpp
11. Merge Sorted Array cpp
12. Add Two Numbers cpp
13. Boats to Save People cpp
14. Minimum Operations to Reduce X to Zero cpp
15. Get Maximum in Generated Array cpp
16. Kth Largest Element in an Array cpp
17. Count Sorted Vowel Strings cpp
18. Max Number of K-Sum Pairs cpp
19. Longest Palindromic Substring cpp
20. Valid Parentheses cpp
21. Find the Most Competitive Subsequence cpp
22. Determine if Two Strings Are Close cpp
23. Sort the Matrix Diagonally cpp
24. Merge k Sorted Lists cpp
25. 1’s Are at Least Length K Places Away cpp
26. Path With Minimum Effort cpp
27. Concatenation of Consecutive Binary Numbers cpp
28. Smallest String With A Given Numeric Value cpp
29. Vertical Order Traversal of a Binary Tree cpp
30. Minimize Deviation in Array cpp
31. Next Permutation cpp