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https://github.com/vishwac09/leet-codes

Collection of Examples solved on LeetCode
https://github.com/vishwac09/leet-codes

leetcode leetcode-solutions

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Collection of Examples solved on LeetCode

Awesome Lists containing this project

README 

        
# LeetCodes



[![Run Test cases on LeetCodes repository](https://github.com/vishwac09/leet-codes/actions/workflows/leet-code-run-tests.yml/badge.svg?branch=master)](https://github.com/vishwac09/leet-codes/actions/workflows/leet-code-run-tests.yml)



Collection of Examples solved on www.leetcode.com



## Running Test Cases



```

./vendor/bin/phpunit --colors=auto tests

npm run tests

```



## Problems



- [Two Sum](https://leetcode.com/problems/two-sum) [PHP | JS]

- [Add Two Numbers](https://leetcode.com/problems/add-two-numbers)

- [Longest Substring Without Repeating Characters](https://leetcode.com/problems/longest-substring-without-repeating-characters) [PHP | JS]

- [Median of Two Sorted Arrays](https://leetcode.com/problems/median-of-two-sorted-arrays) [PHP | JS]

- [ZigZag Conversion](https://leetcode.com/problems/zigzag-conversion) [PHP | JS]

- [Reverse Integer](https://leetcode.com/problems/reverse-integer) [PHP | JS]

- [String to Integer (atoi)](https://leetcode.com/problems/string-to-integer-atoi) [PHP | JS]

- [Palindrome Number](https://leetcode.com/problems/palindrome-number) [PHP | JS]

- [Regular Expression Matching](https://leetcode.com/problems/regular-expression-matching) (https://www.youtube.com/watch?v=HAA8mgxlov8&t=2s)

- [Maximum Product Difference Between Two Pairs](https://leetcode.com/problems/maximum-product-difference-between-two-pairs/) [PHP | JS]

- [Number Complement](https://leetcode.com/problems/number-complement/) [PHP | JS]

- [Increasing Subsequences](https://leetcode.com/problems/increasing-subsequences/)

- [Three Sum](https://leetcode.com/problems/3sum/)

- [Roman To Integer](https://leetcode.com/problems/roman-to-integer/)

- [Longest Common Prefix](https://leetcode.com/problems/longest-common-prefix/)

- [Valid Parentheses](https://leetcode.com/problems/valid-parentheses/)

- [Merge Two Sorted Arrays](https://leetcode.com/problems/merge-two-sorted-lists/)

- [Remove Duplicates from Sorted Array](https://leetcode.com/problems/remove-duplicates-from-sorted-array/)

- [Remove Element](https://leetcode.com/problems/remove-element/)

- [Implement strStr()](https://leetcode.com/problems/implement-strstr/)

- [Search Insert Position](https://leetcode.com/problems/search-insert-position/)

- [Maximum Subarray](https://leetcode.com/problems/maximum-subarray/)

- [Length of Last Word](https://leetcode.com/problems/length-of-last-word/)

- [Plus One](https://leetcode.com/problems/plus-one/)

- [Add Binary](https://leetcode.com/problems/add-binary/)

- [Sqrt(x)](https://leetcode.com/problems/sqrtx/)

- [Climbing Stairs](https://leetcode.com/problems/climbing-stairs/)

- [Remove Duplicates from Sorted List](https://leetcode.com/problems/remove-duplicates-from-sorted-list/)

- [Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/)

- [Binary Tree Inorder Traversal](https://leetcode.com/problems/binary-tree-inorder-traversal/)

- [Same Tree](https://leetcode.com/problems/same-tree/)

- [Valid Palindrome](https://leetcode.com/problems/valid-palindrome/)

- [Number of 1 Bits](https://leetcode.com/problems/number-of-1-bits/)

- [Reverse Bits](https://leetcode.com/problems/reverse-bits/)

- [Excel Sheet Column Number](https://leetcode.com/problems/excel-sheet-column-number/)

- [Excel Sheet Column Title](https://leetcode.com/problems/excel-sheet-column-title/)

- [Majority Element](https://leetcode.com/problems/majority-element/)

- [Min Stack](https://leetcode.com/problems/min-stack/)

- [Binary Tree Postorder Traversal](https://leetcode.com/problems/binary-tree-postorder-traversal/)

- [Binary Tree Preorder Traversal](https://leetcode.com/problems/binary-tree-preorder-traversal/)

- [SingleNumber](https://leetcode.com/problems/single-number/)

- [Best Time Buy Sell Stock](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/)

- [Linked List Cycle](https://leetcode.com/problems/linked-list-cycle/)

- [Search in a Binary Search Tree](https://leetcode.com/problems/search-in-a-binary-search-tree/)

- [Path Sum](https://leetcode.com/problems/path-sum/)

- [Trim a Binary Search Tree](https://leetcode.com/problems/trim-a-binary-search-tree/)

- [Pascal's Triangle](https://leetcode.com/problems/pascals-triangle/)

- [Pascal's Triangle II](https://leetcode.com/problems/pascals-triangle-ii/)

- [Path Sum II](https://leetcode.com/problems/path-sum-ii/)

- [Convert BST to Greater Tree](https://leetcode.com/problems/convert-bst-to-greater-tree/)

- [Binary Search Tree to Greater Sum Tree](https://leetcode.com/problems/binary-search-tree-to-greater-sum-tree/)

- [Minimum Depth of Binary Tree](https://leetcode.com/problems/minimum-depth-of-binary-tree/)

- [Maximum Depth of Binary Tree](https://leetcode.com/problems/maximum-depth-of-binary-tree/)

- [Reverse Linked List](https://leetcode.com/problems/reverse-linked-list/)

- [Increasing Order Search Tree](https://leetcode.com/problems/increasing-order-search-tree/)

- [Kth Smallest Element in a BST](https://leetcode.com/problems/kth-smallest-element-in-a-bst/)

- [Remove Nth Node From End of List](https://leetcode.com/problems/remove-nth-node-from-end-of-list/)

- [Recover Binary Search Tree](https://leetcode.com/problems/recover-binary-search-tree/)

- [Convert Sorted Array to Binary Search Tree](https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/)

- [Binary Search Tree Iterator](https://leetcode.com/problems/binary-search-tree-iterator/)

- [Design HashSet](https://leetcode.com/problems/design-hashset/)

- [Happy Number](https://leetcode.com/problems/happy-number/)

- [Remove Linked List Elements](https://leetcode.com/problems/remove-linked-list-elements/)

- [Contains Duplicate](https://leetcode.com/problems/contains-duplicate/)

- [Design HashMap](https://leetcode.com/problems/design-hashmap/)

- [Implement Stack using Queues](https://leetcode.com/problems/implement-stack-using-queues/)

- [Encode and Decode TinyURL](https://leetcode.com/problems/encode-and-decode-tinyurl/)

- [Container With Most Water](https://leetcode.com/problems/container-with-most-water/)

- [Design Underground System](https://leetcode.com/problems/design-underground-system/)

- [Ransom note](https://leetcode.com/problems/ransom-note/)

- [Contains Duplicate II](https://leetcode.com/problems/contains-duplicate-ii/)

- [Isomorphic Strings](https://leetcode.com/problems/isomorphic-strings/)

- [Intersection of Two Linked Lists](https://leetcode.com/problems/intersection-of-two-linked-lists/)

- [Symmetric Tree](https://leetcode.com/problems/symmetric-tree/)

- [Summary Ranges](https://leetcode.com/problems/summary-ranges/)

- [Peeking Iterator](https://leetcode.com/problems/peeking-iterator/)

- [Balanced Binary Tree](https://leetcode.com/problems/balanced-binary-tree/)

- [Valid Perfect Square](https://leetcode.com/problems/valid-perfect-square/)

- [Power of Two](https://leetcode.com/problems/power-of-two/)

- [Implement Queue Stacks](https://leetcode.com/problems/implement-queue-using-stacks/)

- [Palindrome Linked List](https://leetcode.com/problems/palindrome-linked-list/)

- [Delete Node in a Linked List](https://leetcode.com/problems/delete-node-in-a-linked-list/)

- [Valid Anagram](https://leetcode.com/problems/valid-anagram/)

- [Backspace String Compare](https://leetcode.com/problems/backspace-string-compare/)

- [First Unique Character in a String](https://leetcode.com/problems/first-unique-character-in-a-string/)

- [Binary Tree Paths](https://leetcode.com/problems/binary-tree-paths/)

- [Add Digits](https://leetcode.com/problems/add-digits/)

- [Sort Array By Parity](https://leetcode.com/problems/sort-array-by-parity/)

- [Invert Binary Tree](https://leetcode.com/problems/invert-binary-tree/)

- [Shortest Unsorted Continuous Subarray](https://leetcode.com/problems/shortest-unsorted-continuous-subarray/)

- [Max Number of K-Sum Pairs](https://leetcode.com/problems/max-number-of-k-sum-pairs/)

- [Find the Difference](https://leetcode.com/problems/find-the-difference/)

- [Implement Stack using Queues](https://leetcode.com/problems/implement-stack-using-queues/)

- [Remove Outermost Parentheses](https://leetcode.com/problems/remove-outermost-parentheses/)

- [Count Prefixes of a Given String](https://leetcode.com/problems/count-prefixes-of-a-given-string/)

- [Remove All Adjacent Duplicates in String II](https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/)

- [132 Pattern](https://leetcode.com/problems/132-pattern/)

- [Replace Elements with Greatest Element on Right Side](https://leetcode.com/problems/replace-elements-with-greatest-element-on-right-side/)

- [Flatten Nested List Iterator](https://leetcode.com/problems/flatten-nested-list-iterator/)

- [Letter Combinations of a Phone Number](https://leetcode.com/problems/letter-combinations-of-a-phone-number/)

- [Merge k Sorted Lists](https://leetcode.com/problems/merge-k-sorted-lists/)

- [Divide Two Integers](https://leetcode.com/problems/divide-two-integers/)

- [Sum of Left Leaves](https://leetcode.com/problems/sum-of-left-leaves/)

- [Combination Sum III](https://leetcode.com/problems/combination-sum-iii/)

- [Combination Sum](https://leetcode.com/problems/combination-sum/)

- [Count Sorted Vowel Strings](https://leetcode.com/problems/count-sorted-vowel-strings/)

- [Populating Next Right Pointers in Each Node II](https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/)

- [Intersection of Two Arrays](https://leetcode.com/problems/intersection-of-two-arrays/)

- [Intersection of Multiple Arrays](https://leetcode.com/problems/intersection-of-multiple-arrays/)

- [Intersection of Two Arrays II](https://leetcode.com/problems/intersection-of-two-arrays-ii/)

- [Palindromic Substrings](https://leetcode.com/problems/palindromic-substrings/)

- [Ones and Zeroes](https://leetcode.com/problems/ones-and-zeroes/)

- [Counting Bits](https://leetcode.com/problems/counting-bits/)

- [Number of Steps to Reduce a Number to Zero](https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero/)

- [Missing Number](https://leetcode.com/problems/missing-number/)

- [Running Sum of 1d Array](https://leetcode.com/problems/running-sum-of-1d-array/)

- [Richest Customer Wealth](https://leetcode.com/problems/richest-customer-wealth/)

- [Transpose Matrix](https://leetcode.com/problems/transpose-matrix/)

- [Move Zeroes](https://leetcode.com/problems/move-zeroes/)

- [Reverse String](https://leetcode.com/problems/reverse-string/)

- [Guess Number Higher or Lower](https://leetcode.com/problems/guess-number-higher-or-lower/)

- [Remove Palindromic Subsequences](https://leetcode.com/problems/remove-palindromic-subsequences/)

- [Two Sum II](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/)

- [Triangle](https://leetcode.com/problems/triangle/)

- [Search Suggestions System](https://leetcode.com/problems/search-suggestions-system/)

- [Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/)

- [Final Value of Variable After Performing Operations](https://leetcode.com/problems/final-value-of-variable-after-performing-operations/)

- [Non-decreasing Array](https://leetcode.com/problems/non-decreasing-array/)

- [Min Cost Climbing Stairs](https://leetcode.com/problems/min-cost-climbing-stairs/)

- [Detect Capital](https://leetcode.com/problems/detect-capital/description/)

- [Delete Columns to Make Sorted](https://leetcode.com/problems/delete-columns-to-make-sorted/)

- [Minimum Rounds to Complete All Tasks](https://leetcode.com/problems/minimum-rounds-to-complete-all-tasks/)

- [Minimum Number of Arrows to Burst Balloons](https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons)

- [Maximum Ice Cream Bars](https://leetcode.com/problems/maximum-ice-cream-bars/)

- [Kids With the Greatest Number of Candies](https://leetcode.com/problems/kids-with-the-greatest-number-of-candies/description/)

- [First Bad Version](https://leetcode.com/problems/first-bad-version/description/)

- [Nim Game](https://leetcode.com/problems/nim-game/description/)

- [Fizz Buzz](https://leetcode.com/problems/fizz-buzz/description/)

- [Third Maximum Number](https://leetcode.com/problems/third-maximum-number/description/)

- [Count Complete Tree Nodes](https://leetcode.com/problems/count-complete-tree-nodes/)

- [Is Power of Three](https://leetcode.com/problems/power-of-three/submissions/1219983297/)

- [Power of Four](https://leetcode.com/problems/power-of-four/description/) PHP | JS

- [Reverse Vowels of String](https://leetcode.com/problems/reverse-vowels-of-a-string/description/)

- [Range Sum Query - Immutable](https://leetcode.com/problems/range-sum-query-immutable/description/)

- [Kth Largest Element in a stream](https://leetcode.com/problems/kth-largest-element-in-a-stream/submissions/1352890317/?envType=daily-question&envId=2024-08-12) JS

- [Keyboard Row](https://leetcode.com/problems/keyboard-row/description/) JS

- [License Key Formatting](https://leetcode.com/problems/license-key-formatting/description/) JS

- [Lemonade Change](https://leetcode.com/problems/lemonade-change/description/?envType=daily-question&envId=2024-08-15) JS

- [Count Segments](https://leetcode.com/problems/number-of-segments-in-a-string/description/) JS

- [Arranging Coins](https://leetcode.com/problems/arranging-coins/description/) JS

- [Distribute Candies](https://leetcode.com/problems/distribute-candies/description/) JS

- [Next Greated Element I](https://leetcode.com/problems/next-greater-element-i/description/) JS

- [Island Perimeter](https://leetcode.com/problems/island-perimeter/description/) JS

- [Teemo Attackig](https://leetcode.com/problems/teemo-attacking/submissions/1369990814/) JS

- [Max Consecutive ones](https://leetcode.com/problems/max-consecutive-ones/description/) JS

- [Assign Cookies](https://leetcode.com/problems/assign-cookies/description/) JS

- [Relative Ranks](https://leetcode.com/problems/relative-ranks/description/) JS

- [Check if Two Chessboard Squares Have the Same Color](https://leetcode.com/problems/check-if-two-chessboard-squares-have-the-same-color/description/) JS

- [K-th Nearest Obstacle Queries](https://leetcode.com/problems/k-th-nearest-obstacle-queries/description/) JS

- [Find the Student that Will Replace the Chalk](https://leetcode.com/problems/find-the-student-that-will-replace-the-chalk/description/) JS

- [Sum of Digits of String After Convert](https://leetcode.com/problems/sum-of-digits-of-string-after-convert/description/) JS

- [Walking Robot Simulation](https://leetcode.com/problems/walking-robot-simulation/description/?envType=daily-question&envId=2024-09-04) JS

- [Middle of the Linked List](https://leetcode.com/problems/middle-of-the-linked-list/description/) JS

- [Find Missing Observations](https://leetcode.com/problems/find-missing-observations/description/) JS

- [Fibonacci Number](https://leetcode.com/problems/fibonacci-number/description/) JS

- [Delete Nodes From Linked List Present in Array](https://leetcode.com/problems/delete-nodes-from-linked-list-present-in-array/description/) JS

- [Linked List in Binary Tree](https://leetcode.com/problems/linked-list-in-binary-tree/description/) JS

- [Split Linked List in Parts](https://leetcode.com/problems/split-linked-list-in-parts/description/) Js

- [Spiral Matrix IV](https://leetcode.com/problems/spiral-matrix-iv/description/) JS

- [Add Strings](https://leetcode.com/problems/add-strings/description/) JS

- [Reverse Words in a String III](https://leetcode.com/problems/reverse-words-in-a-string-iii/description/) JS

- [Divide Two Integers](https://leetcode.com) JS

- [Insert Greatest Common Divisors in Linked List](https://leetcode.com/problems/insert-greatest-common-divisors-in-linked-list/description/) JS

- [Minimum Operations to Exceed Threshold Value I](https://leetcode.com/problems/minimum-operations-to-exceed-threshold-value-i/description/)

- [Minimum Bit Flips to Convert Number](https://leetcode.com/problems/minimum-bit-flips-to-convert-number/description/)

- [Count the Number of Consistent Strings](https://leetcode.com/problems/count-the-number-of-consistent-strings/description/) JS

- [Binary Number with Alternating Bits](https://leetcode.com/problems/binary-number-with-alternating-bits/description/) JS

- [Perfect Number](https://leetcode.com/problems/perfect-number/description/)

- [XOR Queries of a Subarray](https://leetcode.com/problems/xor-queries-of-a-subarray/description/) JS

- [Find All Numbers Disappeared in an Array](https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/description/) JS

- [Longest Subarray With Maximum Bitwise AND](https://leetcode.com/problems/longest-subarray-with-maximum-bitwise-and/description) JS

- [Find the Longest Substring Containing Vowels in Even Counts](https://leetcode.com/problems/find-the-longest-substring-containing-vowels-in-even-counts/description) JS

- [Minimum Time Difference](https://leetcode.com/problems/minimum-time-difference/description/) JS

- [Uncommon Words from Two Sentences](https://leetcode.com/problems/uncommon-words-from-two-sentences/description/) JS

- [Can place flowers](https://leetcode.com/problems/can-place-flowers/description/) JS

- [Largest Number](https://leetcode.com/problems/largest-number/description/) JS

- [Permutations](https://leetcode.com/problems/permutations/) JS

- [Different Ways to Add Parentheses](https://leetcode.com/problems/different-ways-to-add-parentheses/description/) JS

- [The Two Sneaky Numbers of Digitville](https://leetcode.com/problems/the-two-sneaky-numbers-of-digitville/description/) JS

- [Shortest Palindrome](https://leetcode.com/problems/shortest-palindrome/description/) JS

- [Lexicographical Numbers](https://leetcode.com/problems/lexicographical-numbers/description/) JS

- [K-th Smallest in Lexicographical Order](https://leetcode.com/problems/k-th-smallest-in-lexicographical-order/description/) JS



## Unsolved



- [Longest Palindromic Substring](https://leetcode.com/problems/longest-palindromic-substring)

- [Min Cost to Connect All Points](https://leetcode.com/problems/min-cost-to-connect-all-points/)

- [Binary Number with Alternating Bits](https://leetcode.com/problems/binary-number-with-alternating-bits/)

- [Word Pattern](https://leetcode.com/problems/word-pattern/)