Welcome to my LeetCode problem-solving repository! This repository contains solutions to various LeetCode problems organized by algorithm patterns and data structures, implemented in both Python and Java.
- Total Problems Solved: 70
- Java Solutions: 52
- Python Solutions: 55
- Sql Solutions: 15
- Categories Covered: 12
The problems are categorized into the following algorithmic patterns:
- Binary Search - Efficient searching in sorted arrays
- Bit Manipulation - Operations using bitwise operators
- Database - SQL queries and database operations
- Dynamic Programming - Optimization problems using memoization
- Greedy - Locally optimal choices leading to global optimum
- Hashing - Hash table and hash map problems
- Linked List - Single and doubly linked list operations
- Sliding Window - Subarray/substring problems
- Stack - LIFO data structure problems
- String Manipulation - String processing and algorithms
- Tree - Binary tree traversal and manipulation
- Two Pointers - Array problems using multiple pointers
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| SearchInsertPosition | LC-35 | Java-35 | Python-35 | - |
| FindMinimumInRotatedArray | LC-153 | Java-153 | Python-153 | - |
| FirstBadVersion | LC-278 | Java-278 | Python-278 | - |
| FindSmallestLetterGreaterThanTarget | LC-744 | Java-744 | Python-744 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| SingleNumber | LC-136 | Java-136 | Python-136 | - |
| SumOfTwoIntegers | LC-371 | Java-371 | Python-371 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| CombineTwoTables | LC-175 | - | - | SQL-175 |
| EmployeesEarningMoreThanTheirManagers | LC-181 | - | - | SQL-181 |
| DuplicateEmails | LC-182 | - | - | SQL-182 |
| CustomersWhoNeverOrder | LC-183 | - | - | SQL-183 |
| DeleteDuplicateEmails | LC-196 | - | - | SQL-196 |
| RisingTemperature | LC-197 | - | - | SQL-197 |
| GamePlayAnalysis I | LC-511 | - | - | SQL-511 |
| EmployeeBonus | LC-577 | - | - | SQL-577 |
| FindCustomerReferee | LC-584 | - | - | SQL-584 |
| CustomerPlacingtheLargestNumberofOrders | LC-586 | - | - | SQL-586 |
| BigCountries | LC-595 | - | - | SQL-595 |
| ClassesWithatLeast5Students | LC-596 | - | - | SQL-596 |
| SalesPerson | LC-607 | - | - | SQL-607 |
| TriangleJudgement | LC-610 | - | - | SQL-610 |
| BiggestSingleNumber | LC-619 | - | - | SQL-619 |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| ClimbingStairs | LC-70 | Java-70 | Python-70 | - |
| FibonacciNumber | LC-509 | Java-509 | Python-509 | - |
| LongestPalindromicSubsequence | LC-516 | Java-516 | Python-516 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| MaximumScoreFromRemovingSubstrings | LC-1717 | Java-1717 | Python-1717 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| TwoSum | LC-1 | Java-1 | Python-1 | - |
| GroupAnagrams | LC-49 | Java-49 | Python-49 | - |
| LongestConsectiveSequence | LC-128 | Java-128 | Python-128 | - |
| HappyNumber | LC-202 | Java-202 | Python-202 | - |
| ContainsDuplicate | LC-217 | Java-217 | Python-217 | - |
| TopKFrequentElements | LC-347 | Java-347 | Python-347 | - |
| TopKFrequentWords | LC-692 | Java-692 | Python-692 | - |
| MaximumUniqueSubarraySumAfterDeletion | LC-3487 | Java-3487 | Python-3487 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| AddTwoNumbers | LC-2 | Java-2 | Python-2 | - |
| RemoveNthNodeFromEndOfList | LC-19 | Java-19 | Python-19 | - |
| MergeTwoSortedLists | LC-21 | Java-21 | Python-21 | - |
| ReverseLinkedListII | LC-92 | Java-92 | Python-92 | - |
| LinkedListCycle | LC-141 | Java-141 | Python-141 | - |
| LinkedListCycleII | LC-142 | Java-142 | Python-142 | - |
| ReverseLinkedList | LC-206 | Java-206 | Python-206 | - |
| PalindromeLinkedList | LC-234 | Java-234 | Python-234 | - |
| DeleteNodeInALinkedList | LC-237 | Java-237 | Python-237 | - |
| MiddleOfTheLinkedList | LC-876 | Java-876 | Python-876 | - |
| DeleteTheMiddleNodeOfALinkedList | LC-2095 | Java-2095 | Python-2095 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| LongestSubstringWithoutRepeatChars | LC-3 | Java-3 | Python-3 | - |
| MinSubArray | LC-209 | Java-209 | Python-209 | - |
| FindMaxAverage I | LC-643 | Java-643 | Python-643 | - |
| FruitIntoBaskets | LC-904 | Java-904 | Python-904 | - |
| NumberOfSubArraysAverageThreshold | LC-1343 | Java-1343 | Python-1343 | - |
| MaximumVowelsSubstringLength | LC-1456 | Java-1456 | Python-1456 | - |
| MaximumErasureValue | LC-1695 | Java-1695 | Python-1695 | - |
| SubstringsOfSizeThreeDistinctChars | LC-1876 | Java-1876 | Python-1876 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| ValidParantheses | LC-20 | Java-20 | Python-20 | - |
| RemovingStarsFromAString | LC-2390 | Java-2390 | Python-2390 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| LongestCommonPrefix | LC-14 | Java-14 | Python-14 | - |
| LengthOfLastWord | LC-58 | Java-58 | Python-58 | - |
| ReverseWordInString | LC-151 | Java-151 | Python-151 | - |
| DeleteCharactersToMakeFancyString | LC-1957 | Java-1957 | Python-1957 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| BinaryTreeInorderTraversal | LC-94 | Java-94 | Python-94 | - |
| SameTree | LC-100 | - | Python-100 | - |
| SymmetricTree | LC-101 | - | Python-101 | - |
| MaximumDepthOfBinaryTree | LC-104 | - | Python-104 | - |
| Problem | LeetCode | Java | Python | SQL |
|---|---|---|---|---|
| LongestPalindromicSubstring | LC-5 | Java-5 | Python-5 | - |
| ContainerWithMostWater | LC-11 | Java-11 | Python-11 | - |
| RemoveDuplicates | LC-26 | Java-26 | Python-26 | - |
| RemoveElement | LC-27 | Java-27 | Python-27 | - |
| TrappingRainWater | LC-42 | Java-42 | Python-42 | - |
| MergeSortedArrray | LC-88 | Java-88 | Python-88 | - |
| TwoSumII | LC-167 | Java-167 | Python-167 | - |
| MoveZeroes | LC-283 | Java-283 | Python-283 | - |
- Python 3.x for running Python solutions
- Java 8+ for running Java solutions
Happy Coding! 🚀
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