LeetCode Solutions - devxoshakya

#1

Two Sum

Easy

0001-two-sum.java

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#2

Add Two Numbers

Medium

0002-add-two-numbers.java

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#3

Longest Substring Without Repeating Characters

Medium

0003-longest-substring-without-repeating-characters.java

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#4

Median of Two Sorted Arrays

Hard

0004-median-of-two-sorted-arrays.java

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#6

Zigzag Conversion

Medium

0006-zigzag-conversion.java

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#7

Reverse Integer

Medium

0007-reverse-integer.java

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#9

Palindrome Number

Easy

0009-palindrome-number.java

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#11

Container With Most Water

Medium

0011-container-with-most-water.java

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#12

Integer to Roman

Medium

0012-integer-to-roman.java

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#13

Roman to Integer

Easy

0013-roman-to-integer.java

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#14

Longest Common Prefix

Easy

0014-longest-common-prefix.java

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#15

3Sum

Medium

0015-3sum.java

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#20

Valid Parentheses

Easy

0020-valid-parentheses.java

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#21

Merge Two Sorted Lists

Easy

0021-merge-two-sorted-lists.java

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#26

Remove Duplicates from Sorted Array

Easy

0026-remove-duplicates-from-sorted-array.java

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#27

Remove Element

Easy

0027-remove-element.java

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#28

Find the Index of the First Occurrence in a String

Easy

0028-find-the-index-of-the-first-occurrence-in-a-string.java

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#30

Substring with Concatenation of All Words

Hard

0030-substring-with-concatenation-of-all-words.java

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#34

Find First and Last Position of Element in Sorted Array

Medium

0034-find-first-and-last-position-of-element-in-sorted-array.java

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#35

Search Insert Position

Easy

0035-search-insert-position.java

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#41

First Missing Positive

Hard

0041-first-missing-positive.java

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#42

Trapping Rain Water

Hard

0042-trapping-rain-water.java

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#45

Jump Game II

Medium

0045-jump-game-ii.java

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#53

Maximum Subarray

Medium

0053-maximum-subarray.java

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#55

Jump Game

Medium

0055-jump-game.java

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#58

Length of Last Word

Easy

0058-length-of-last-word.java

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#61

Rotate List

Medium

0061-rotate-list.java

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#66

Plus One

Easy

0066-plus-one.java

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#67

Add Binary

Easy

0067-add-binary.java

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#69

Sqrt(x)

Easy

0069-sqrtx.java

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#70

Climbing Stairs

Easy

0070-climbing-stairs.java

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#75

Sort Colors

Medium

0075-sort-colors.java

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#76

Minimum Window Substring

Hard

0076-minimum-window-substring.java

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#79

Word Search

Medium

0079-word-search.java

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#80

Remove Duplicates from Sorted Array II

Medium

0080-remove-duplicates-from-sorted-array-ii.java

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#83

Remove Duplicates from Sorted List

Easy

0083-remove-duplicates-from-sorted-list.java

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#84

Largest Rectangle in Histogram

Hard

0084-largest-rectangle-in-histogram.java

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#88

Merge Sorted Array

Easy

0088-merge-sorted-array.java

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#92

Reverse Linked List II

Medium

0092-reverse-linked-list-ii.java

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#94

Binary Tree Inorder Traversal

Easy

0094-binary-tree-inorder-traversal.java

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#98

Validate Binary Search Tree

Medium

0098-validate-binary-search-tree.java

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#100

Same Tree

Easy

0100-same-tree.java

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#101

Symmetric Tree

Easy

0101-symmetric-tree.java

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#102

Binary Tree Level Order Traversal

Medium

0102-binary-tree-level-order-traversal.java

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#103

Binary Tree Zigzag Level Order Traversal

Medium

0103-binary-tree-zigzag-level-order-traversal.java

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#104

Maximum Depth of Binary Tree

Easy

0104-maximum-depth-of-binary-tree.java

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#105

Construct Binary Tree from Preorder and Inorder Traversal

Medium

0105-construct-binary-tree-from-preorder-and-inorder-traversal.java

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#107

Binary Tree Level Order Traversal II

Medium

0107-binary-tree-level-order-traversal-ii.java

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#108

Convert Sorted Array to Binary Search Tree

Easy

0108-convert-sorted-array-to-binary-search-tree.java

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#110

Balanced Binary Tree

Easy

0110-balanced-binary-tree.java

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#112

Path Sum

Easy

0112-path-sum.java

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#114

Flatten Binary Tree to Linked List

Medium

0114-flatten-binary-tree-to-linked-list.java

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#116

Populating Next Right Pointers in Each Node

Medium

0116-populating-next-right-pointers-in-each-node.java

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#121

Best Time to Buy and Sell Stock

Easy

0121-best-time-to-buy-and-sell-stock.java

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#122

Best Time to Buy and Sell Stock II

Medium

0122-best-time-to-buy-and-sell-stock-ii.java

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#125

Valid Palindrome

Easy

0125-valid-palindrome.java

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#134

Gas Station

Medium

0134-gas-station.java

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#135

Candy

Hard

0135-candy.java

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#136

Single Number

Easy

0136-single-number.java

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#141

Linked List Cycle

Easy

0141-linked-list-cycle.java

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#142

Linked List Cycle II

Medium

0142-linked-list-cycle-ii.java

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#143

Reorder List

Medium

0143-reorder-list.java

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#145

Binary Tree Postorder Traversal

Easy

0145-binary-tree-postorder-traversal.java

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#148

Sort List

Medium

0148-sort-list.java

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#151

Reverse Words in a String

Medium

0151-reverse-words-in-a-string.java

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#160

Intersection of Two Linked Lists

Easy

0160-intersection-of-two-linked-lists.java

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#162

Find Peak Element

Medium

0162-find-peak-element.java

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#167

Two Sum II - Input Array Is Sorted

Medium

0167-two-sum-ii-input-array-is-sorted.java

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#169

Majority Element

Easy

0169-majority-element.java

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#171

Excel Sheet Column Number

Easy

0171-excel-sheet-column-number.java

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#175

Combine Two Tables

Easy

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#181

Employees Earning More Than Their Managers

Easy

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#189

Rotate Array

Medium

0189-rotate-array.java

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#191

Number of 1 Bits

Easy

0191-number-of-1-bits.java

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#196

Delete Duplicate Emails

Easy

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#199

Binary Tree Right Side View

Medium

0199-binary-tree-right-side-view.java

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#202

Happy Number

Easy

0202-happy-number.java

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#203

Remove Linked List Elements

Easy

0203-remove-linked-list-elements.java

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#205

Isomorphic Strings

Easy

0205-isomorphic-strings.java

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#206

Reverse Linked List

Easy

0206-reverse-linked-list.java

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#209

Minimum Size Subarray Sum

Medium

0209-minimum-size-subarray-sum.java

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#217

Contains Duplicate

Easy

0217-contains-duplicate.java

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#219

Contains Duplicate II

Easy

0219-contains-duplicate-ii.java

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#222

Count Complete Tree Nodes

Easy

0222-count-complete-tree-nodes.java

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#226

Invert Binary Tree

Easy

0226-invert-binary-tree.java

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#230

Kth Smallest Element in a BST

Medium

0230-kth-smallest-element-in-a-bst.java

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#231

Power of Two

Easy

0231-power-of-two.java

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#232

Implement Queue using Stacks

Easy

0232-implement-queue-using-stacks.java

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#234

Palindrome Linked List

Easy

0234-palindrome-linked-list.java

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#235

Lowest Common Ancestor of a Binary Search Tree

Medium

0235-lowest-common-ancestor-of-a-binary-search-tree.java

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#236

Lowest Common Ancestor of a Binary Tree

Medium

0236-lowest-common-ancestor-of-a-binary-tree.java

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#237

Delete Node in a Linked List

Medium

0237-delete-node-in-a-linked-list.java

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#238

Product of Array Except Self

Medium

0238-product-of-array-except-self.java

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#242

Valid Anagram

Easy

0242-valid-anagram.java

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#258

Add Digits

Easy

0258-add-digits.java

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#268

Missing Number

Easy

0268-missing-number.java

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#274

H-Index

Medium

0274-h-index.java

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#278

First Bad Version

Easy

0278-first-bad-version.java

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#283

Move Zeroes

Easy

0283-move-zeroes.java

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#287

Find the Duplicate Number

Medium

0287-find-the-duplicate-number.java

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#292

Nim Game

Easy

0292-nim-game.java

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#326

Power of Three

Easy

0326-power-of-three.java

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#342

Power of Four

Easy

0342-power-of-four.java

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#344

Reverse String

Easy

0344-reverse-string.java

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#345

Reverse Vowels of a String

Easy

0345-reverse-vowels-of-a-string.java

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#367

Valid Perfect Square

Easy

0367-valid-perfect-square.java

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#371

Sum of Two Integers

Medium

0371-sum-of-two-integers.java

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#374

Guess Number Higher or Lower

Easy

0374-guess-number-higher-or-lower.java

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#380

Insert Delete GetRandom O(1)

Medium

0380-insert-delete-getrandom-o1.java

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#383

Ransom Note

Easy

0383-ransom-note.java

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#387

First Unique Character in a String

Easy

0387-first-unique-character-in-a-string.java

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#392

Is Subsequence

Easy

0392-is-subsequence.java

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#404

Sum of Left Leaves

Easy

0404-sum-of-left-leaves.java

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#412

Fizz Buzz

Easy

0412-fizz-buzz.java

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#441

Arranging Coins

Easy

0441-arranging-coins.java

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#442

Find All Duplicates in an Array

Medium

0442-find-all-duplicates-in-an-array.java

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#448

Find All Numbers Disappeared in an Array

Easy

0448-find-all-numbers-disappeared-in-an-array.java

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#485

Max Consecutive Ones

Easy

0485-max-consecutive-ones.java

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#543

Diameter of Binary Tree

Easy

0543-diameter-of-binary-tree.java

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#557

Reverse Words in a String III

Easy

0557-reverse-words-in-a-string-iii.java

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#560

Subarray Sum Equals K

Medium

0560-subarray-sum-equals-k.java

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#584

Find Customer Referee

Easy

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#620

Not Boring Movies

Easy

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#637

Average of Levels in Binary Tree

Easy

0637-average-of-levels-in-binary-tree.java

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#645

Set Mismatch

Easy

0645-set-mismatch.java

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#657

Robot Return to Origin

Easy

0657-robot-return-to-origin.java

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#704

Binary Search

Easy

0704-binary-search.java

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#742

To Lower Case

Easy

0742-to-lower-case.java

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#744

Find Smallest Letter Greater Than Target

Easy

0744-find-smallest-letter-greater-than-target.java

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#745

Find Smallest Letter Greater Than Target

Easy

0745-find-smallest-letter-greater-than-target.java

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#817

Design HashMap

Easy

0817-design-hashmap.java

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#852

Peak Index in a Mountain Array

Medium

0852-peak-index-in-a-mountain-array.java

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#860

Design Circular Queue

Medium

0860-design-circular-queue.java

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#861

Flipping an Image

Easy

0861-flipping-an-image.java

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#898

Transpose Matrix

Easy

0898-transpose-matrix.java

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#908

Middle of the Linked List

Easy

0908-middle-of-the-linked-list.java

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#948

Sort an Array

Medium

0948-sort-an-array.java

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#954

Maximum Sum Circular Subarray

Medium

0918-maximum-sum-circular-subarray.java

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#957

Minimum Add to Make Parentheses Valid

Medium

0957-minimum-add-to-make-parentheses-valid.java

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#1013

Fibonacci Number

Easy

0509-fibonacci-number.java

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#1031

Add to Array-Form of Integer

Easy

1031-add-to-array-form-of-integer.java

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#1031

Add to Array-Form of Integer

Easy

0989-add-to-array-form-of-integer.java

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#1035

Cousins in Binary Tree

Easy

1035-cousins-in-binary-tree.java

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#1095

Find in Mountain Array

Hard

1095-find-in-mountain-array.java

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#1108

Defanging an IP Address

Easy

1108-defanging-an-ip-address.java

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#1171

Remove Zero Sum Consecutive Nodes from Linked List

Medium

1171-remove-zero-sum-consecutive-nodes-from-linked-list.java

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#1203

Print in Order

Easy

1203-print-in-order.java

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#1205

Defanging an IP Address

Easy

1205-defanging-an-ip-address.java

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#1288

Maximum Subarray Sum with One Deletion

Medium

1186-maximum-subarray-sum-with-one-deletion.java

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#1295

Find Numbers with Even Number of Digits

Easy

1295-find-numbers-with-even-number-of-digits.java

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#1342

Number of Steps to Reduce a Number to Zero

Easy

1342-number-of-steps-to-reduce-a-number-to-zero.java

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#1346

Check If N and Its Double Exist

Easy

1346-check-if-n-and-its-double-exist.java

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#1378

Cells with Odd Values in a Matrix

Easy

1378-cells-with-odd-values-in-a-matrix.java

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#1411

Convert Binary Number in a Linked List to Integer

Easy

1411-convert-binary-number-in-a-linked-list-to-integer.java

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#1421

Find Numbers with Even Number of Digits

Easy

1421-find-numbers-with-even-number-of-digits.java

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#1426

Find N Unique Integers Sum up to Zero

Easy

1426-find-n-unique-integers-sum-up-to-zero.java

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#1482

How Many Numbers Are Smaller Than the Current Number

Easy

1482-how-many-numbers-are-smaller-than-the-current-number.java

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#1496

Lucky Numbers in a Matrix

Easy

1496-lucky-numbers-in-a-matrix.java

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#1505

Create Target Array in the Given Order

Easy

1505-create-target-array-in-the-given-order.java

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#1528

Kids With the Greatest Number of Candies

Easy

1528-kids-with-the-greatest-number-of-candies.java

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#1570

Final Prices With a Special Discount in a Shop

Easy

1475-final-prices-with-a-special-discount-in-a-shop.java

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#1580

Shuffle the Array

Easy

1580-shuffle-the-array.java

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#1580

Shuffle the Array

Easy

1470-shuffle-the-array.java

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#1603

Running Sum of 1d Array

Easy

1603-running-sum-of-1d-array.java

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#1635

Number of Good Pairs

Easy

1635-number-of-good-pairs.java

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#1646

Kth Missing Positive Number

Easy

1646-kth-missing-positive-number.java

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#1648

Minimum Insertions to Balance a Parentheses String

Medium

1648-minimum-insertions-to-balance-a-parentheses-string.java

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#1651

Shuffle String

Easy

1651-shuffle-string.java

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#1677

Matrix Diagonal Sum

Easy

1677-matrix-diagonal-sum.java

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#1781

Check If Two String Arrays are Equivalent

Easy

1781-check-if-two-string-arrays-are-equivalent.java

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#1791

Richest Customer Wealth

Easy

1791-richest-customer-wealth.java

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#1797

Goal Parser Interpretation

Easy

1797-goal-parser-interpretation.java

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#1823

Determine if String Halves Are Alike

Easy

1823-determine-if-string-halves-are-alike.java

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#1899

Count Items Matching a Rule

Easy

1899-count-items-matching-a-rule.java

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#1960

Check if the Sentence Is Pangram

Easy

1960-check-if-the-sentence-is-pangram.java

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#1970

Sorting the Sentence

Easy

1970-sorting-the-sentence.java

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#2048

Build Array from Permutation

Easy

2048-build-array-from-permutation.java

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#2058

Concatenation of Array

Easy

1929-concatenation-of-array.java

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#2058

Concatenation of Array

Easy

2058-concatenation-of-array.java

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#2099

Number of Strings That Appear as Substrings in Word

Easy

2099-number-of-strings-that-appear-as-substrings-in-word.java

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#2350

Find Closest Number to Zero

Easy

2350-find-closest-number-to-zero.java

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#2485

Find the Pivot Integer

Easy

2485-find-the-pivot-integer.java

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#2731

Memoize

Medium

2623-memoize.js

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#2732

Counter

Easy

2620-counter.js

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#2746

Filter Elements from Array

Easy

2634-filter-elements-from-array.js

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#2747

Apply Transform Over Each Element in Array

Easy

2635-apply-transform-over-each-element-in-array.js

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#2761

Array Reduce Transformation

Easy

2626-array-reduce-transformation.js

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#2784

Check if Array is Good

Easy

2784-check-if-array-is-good.java

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#2789

Counter II

Easy

2665-counter-ii.js

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#2809

Create Hello World Function

Easy

2809-create-hello-world-function.js

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#2813

To Be Or Not To Be

Easy

2704-to-be-or-not-to-be.js

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#2820

Return Length of Arguments Passed

Easy

2703-return-length-of-arguments-passed.js

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#2951

Find the Peaks

Easy

2951-find-the-peaks.java

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#2974

Minimum Number Game

Easy

2974-minimum-number-game.java

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#2980

Check if Bitwise OR Has Trailing Zeros

Easy

2980-check-if-bitwise-or-has-trailing-zeros.java

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#3309

Count Prefix and Suffix Pairs I

Easy

3042-count-prefix-and-suffix-pairs-i.java

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#3311

Ant on the Boundary

Easy

3028-ant-on-the-boundary.java

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#3320

Maximum Number of Operations With the Same Score I

Easy

3038-maximum-number-of-operations-with-the-same-score-i.java

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#3330

Modify the Matrix

Easy

3033-modify-the-matrix.java

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#3371

Harshad Number

Easy

3099-harshad-number.java

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#3379

Score of a String

Easy

3110-score-of-a-string.java

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#3429

Special Array I

Easy

3151-special-array-i.java

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#3567

Convert Date to Binary

Easy

3280-convert-date-to-binary.java

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#3579

Maximum Possible Number by Binary Concatenation

Medium

3579-maximum-possible-number-by-binary-concatenation.java

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#3581

The Two Sneaky Numbers of Digitville

Easy

3289-the-two-sneaky-numbers-of-digitville.java

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#3582

Find Indices of Stable Mountains

Easy

3285-find-indices-of-stable-mountains.java

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