README.md

LeetCode Problem of the Day Solutions

A collection of daily LeetCode problems with solutions.

Index

January 2025

• [Jan 1] 1422. Maximum_Score_After_Splitting_a_String
• [Jan 2] 2559. Count Vowel Strings in Ranges
• [Jan 3] 2270. Number of Ways to Split Array
• [Jan 4] 1930. Unique Length-3 Palindromic Subsequences
• [Jan 5] 2381. Shifting Letters II
• [Jan 6] 1769. Minimum Number of Operations to Move All Balls to Each Box
• [Jan 7] 1408. String Matching in an Array
• [Jan 8] 3042. Count Prefix and Suffix Pairs I
• [Jan 9] 2185. Counting Words With a Given Prefix
• [Jan 10] 916. Word Subsets
• [Jan 11] 1400. Construct K Palindrome Strings
• [Jan 12] 2116. Check if a Parentheses String Can Be Valid
• [Jan 13] 3223. Minimum Length of String After Operations
• [Jan 14] 2657. Find the Prefix Common Array of Two Arrays
• [Jan 15] 2429. Minimize XOR
• [Jan 16] 2425. Bitwise XOR of All Pairings
• [Jan 17] 2683. Neighboring Bitwise XOR
• [Jan 18] 1368. Minimum Cost to Make at Least One Valid Path in a Grid
• [Jan 19] 407. Trapping Rain Water II
• [Jan 20] 2661. First Completely Painted Row or Column
• [Jan 21] 2017. Grid Game
• [Jan 22] 1765. Map of Highest Peak
• [Jan 23] 1267. Count Servers that Communicate
• [Jan 24] 802. Find Eventual Safe States
• [Jan 25] 2948. Make Lexicographically Smallest Array by Swapping Elements
• [Jan 26] 2127. Maximum Employees to Be Invited to a Meeting
• [Jan 27] 1462. Course Schedule IV
• [Jan 28] 2658. Maximum Number of Fish in a Grid
• [Jan 29] 684. Redundant Connection
• [Jan 30] 2493. Divide Nodes Into the Maximum Number of Groups
• [Jan 31] 827. Making A Large Island

February 2025

• [Feb 1] 3151. Special Array I
• [Feb 2] 1752. Check if Array Is Sorted and Rotated
• [Feb 3] 3105. Longest Strictly Increasing or Strictly Decreasing Subarray
• [Feb 4] 1800. Maximum Ascending Subarray Sum4
• [Feb 5] 1790. Check if One String Swap Can Make Strings Equa
• [Feb 6] 1726. Tuple with Same Product
• [Feb 7] 3160. Find the Number of Distinct Colors Among the Balls
• [Feb 8] 2349. Design a Number Container System
• [Feb 9] 2364. Count Number of Bad Pairs
• [Feb 10] 3174. Clear Digits
• [Feb 11] 1910. Remove All Occurrences of a Substring
• [Feb 12] 2342. Max Sum of a Pair With Equal Sum of Digits
• [Feb 13] 3066. Minimum Operations to Exceed Threshold Value II
• [Feb 14] 1352. Product of the Last K Numbers
• [Feb 15] 2698. Find the Punishment Number of an Integer
• [Feb 16] 1718. Construct the Lexicographically Largest Valid Sequence
• [Feb 17] 1079. Letter Tile Possibilities
• [Feb 18] 2375. Construct Smallest Number From DI String
• [Feb 19] 1415. The k-th Lexicographical String of All Happy Strings of Length n
• [Feb 20] 1980. Find Unique Binary String
• [Feb 21] 1261. Find Elements in a Contaminated Binary Tree
• [Feb 22] 1028. Recover a Tree From Preorder Traversal
• [Feb 23] 889. Construct Binary Tree from Preorder and Postorder Traversal
• [Feb 24] 2467. Most Profitable Path in a Tree
• [Feb 25] 1524. Number of Sub-arrays With Odd Sum
• [Feb 26] 1749. Maximum Absolute Sum of Any Subarray
• [Feb 27] 873. Length of Longest Fibonacci Subsequence
• [Feb 28] 1092. Shortest Common Supersequence

March 2025

• [Mar 1] 2460. Apply Operations to an Array
• [Mar 2] 2570. Merge Two 2D Arrays by Summing Values
• [Mar 3] 2161. Partition Array According to Given Pivot
• [Mar 4] 1780. Check if Number is a Sum of Powers of Three
• [Mar 5] 2579. Count Total Number of Colored Cells
• [Mar 6] 2965. Find Missing and Repeated Values
• [Mar 7] 2523. Closest Prime Numbers in Range
• [Mar 8] 2379. Minimum Recolors to Get K Consecutive Black Blocks
• [Mar 9] 3208. Alternating Groups II
• [Mar 10] 3306. Count of Substrings Containing Every Vowel and K Consonants II
• [Mar 11] 1358. Number of Substrings Containing All Three Characters
• [Mar 12] 2529. Maximum Count of Positive Integer and Negative Integer
• [Mar 13] 3356. Zero Array Transformation II
• [Mar 14] 2226. Maximum Candies Allocated to K Children
• [Mar 15] 2560. House Robber IV
• [Mar 16] 2594. Minimum Time to Repair Cars
• [Mar 17] 2206. Divide Array Into Equal Pairs
• [Mar 18] 2401. Longest Nice Subarray
• [Mar 19] 3191. Minimum Operations to Make Binary Array Elements Equal to One I
• [Mar 20] 3108. Minimum Cost Walk in Weighted Graph
• [Mar 21] 2115. Find All Possible Recipes from Given Supplies
• [Mar 22] 2685. Count the Number of Complete Components
• [Mar 23] 1976. Number of Ways to Arrive at Destination
• [Mar 24] 3169. Count Days Without Meetings
• [Mar 25] 3394. Check if Grid can be Cut into Sections
• [Mar 26] 2033. Minimum Operations to Make a Uni-Value Grid
• [Mar 27] 2780. Minimum Index of a Valid Split
• [Mar 28] 2503. Maximum Number of Points From Grid Queries
• [Mar 29] 2818. Apply Operations to Maximize Score
• [Mar 30] 763. Partition Labels
• [Mar 31] 2551. Put Marbles in Bags

April 2025

• [Apr 1] 2140. Solving Questions With Brainpower
• [Apr 2] 2873. Maximum Value of an Ordered Triplet I
• [Apr 3] 2874. Maximum Value of an Ordered Triplet II
• [Apr 4] 1123. Lowest Common Ancestor of Deepest Leaves
• [Apr 5] 1863. Sum of All Subset XOR Totals
• [Apr 6] 368. Largest Divisible Subset
• [Apr 7] 416. Partition Equal Subset Sum
• [Apr 8] 3396. Minimum Number of Operations to Make Elements in Array Distinct
• [Apr 9] 3375. Minimum Operations to Make Array Values Equal to K
• [Apr 10] 2999. Count the Number of Powerful Integers
• [Apr 11] 2843. Count Symmetric Integers
• [Apr 12] 3272. Find the Count of Good Integers
• [Apr 13] 1922. Count Good Numbers
• [Apr 14] 1534. Count Good Triplets
• [Apr 15] 2179. Count Good Triplets in an Array
• [Apr 16] 2537. Count the Number of Good Subarrays
• [apr 17] 2176. Count Equal and Divisible Pairs in an Array
• [Apr 18] 38. Count and Say
• [Apr 19] 2563. Count the Number of Fair Pairs
• [Apr 20] 781. Rabbits in Forest

Structure

Each solution includes:

• Problem description
• Approach explanation
• Time and Space complexity
• Solution code

Language Used

• Primary: C++
• Alternative solutions in other languages are welcome

Resources

• LeetCode Profile

License

This repository is licensed under the MIT License - see the LICENSE file for details.