Skip to the content.

April 2021 LeetCoding Challenge

Day Question Links Solutions
1. Palindrome Linked List cpp
2. Ones and Zeroes cpp
3. Longest Valid Parentheses cpp
4. Design Circular Queue cpp
5. Global and Local Inversions cpp
6. Minimum Operations to Make Array Equal cpp
7. Determine if String Halves Are Alike cpp
8. Letter Combinations of a Phone Number cpp
9. Verifying an Alien Dictionary cpp
10. Longest Increasing Path in a Matrix cpp
11. Deepest Leaves Sum cpp
12. Beautiful Arrangement II cpp
13. Flatten Nested List Iterator cpp
14. Partition List cpp
15. Fibonacci Number cpp
16. Remove All Adjacent Duplicates in String II cpp
17. Number of Submatrices That Sum to Target cpp
18. Remove Nth Node From End of List cpp
19. Combination Sum IV cpp
20. N-ary Tree Preorder Traversal cpp
21. Triangle cpp
22. Brick Wall cpp
23. Count Binary Substrings cpp
25. Rotate Image cpp
26. Furthest Building You Can Reach cpp
27. Power of Three cpp
28. Unique Paths II cpp
29. Find First and Last Position of Element in Sorted Array cpp
30. Powerful Integers cpp