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Algorithms

ARRAYS

  1. Beautiful Arrangement II

  2. Contiguous Array

  3. Longest Increasing Subsequence using Patience Sort

  4. Minimum Operations to Reduce X to Zero

  5. Minimum Operations to Make array equal

  6. Sort Array by Parity

  7. Subarray Sum Equals K

  8. Check if Array Is Sorted and Rotated

  9. Rotate Array

  10. Move Zeroes

  11. Missing Number

  12. Minimum Deviation in Array

  13. Container With Most Water

  14. Sort a binary array using one traversal

  15. Minimum Number of removals to make a Mountain Array

  16. Max Number of K-Sum Pairs

  17. Find the most competetive subsequence

  18. Construct Target Array With Multiple Sums

  19. Kth Largest Element in an array

  20. Longest Increasing subsequence

  21. Sort the matrix diagonally

  22. Path with Minimum Effort

  23. Merge Sorted Array

  24. Kth Missing positive Number

  25. Get Maximum in generated Array

  26. Check If All 1's Are at Least Length K Places Away

  27. Diagonal Traverse

  28. Smallest Range II

  29. Check Array Formation Through Concatenation

  30. Beautiful Arrangements

  31. Wiggle Subsequence

  32. Set Mismatch

  33. First Missing Positive Number

  34. Rearrange positive and negative integers

  35. Shortest Unsorted Continous Subarray

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ARRAYLIST

  1. Numbers With Repeated Digits

  2. Triangle

  3. Subsets

  4. Combination Sum (Backtracking)

BINARY SEARCH

  1. Kth Smallest Number in Multiplication Table

  2. Minimum Number of Days to Make m Bouquets

  3. Koko Eating Bananas

  4. Split Array Largest Sum

  5. Capacity To Ship Packages Within D days

  6. Search in Rotated Sorted Array

  7. Find Minimum in Rotate Sorted Array

  8. Find K-th Smallest Pair Distance

STRING

  1. Word Ladder

  2. Longest Palindrome Substring

  3. Check If a String Contains All Binary Codes of Size K

  4. Longest Nice Substring

  5. Determine if String Halves are equal

  6. Palindromic Substrings

  7. Longest Word in Dictionary through Deleting

  8. Determine if two strings are close

  9. Delete Operation for two Strings

  10. Minimum ASCII Delete Sum for two strings

  11. Longest Common subsequence

  12. Valid Parantheses

  13. Shortest Distance to a Character

  14. Count Sorted Vowel Strings

  15. Replace the Substring for Balanced String

  16. Minimum Deletion Cost to Avoid repeating characters

  17. Maximum Number of Non-Overlapping substrings

  18. Maximum number of Occurrence of a substring

  19. Longest Substring Without repeating characters

  20. Check if two String arrays are Equivalent

  21. Integer To Roman

  22. Remove Palindromic Subsequence

  23. Largest Merge of Two Strings

  24. Remove All Adjacent Duplicates in String II

  25. Short Encoding of Words

  26. Score of Parenthesers

  27. Valid Anagram

  28. Verifying an Alien Language

  29. Word Subset

TREE

  1. Create Sorted Array through Instructions

  2. K-similar Strings

  3. Deepest Leaves Sum

  4. Vertical Order Traversal of a Binary Tree

  5. All Elements in Two Binary Search Trees

  6. Binary Tree Right Side View

  7. Trim a Binary Search Tree

  8. Balanced Binary Tree

  9. Pseudo-Palindromic Paths in Binary Tree

  10. Binary Trees With Factors

  11. Add One Row to Tree

  12. Average of Levels in Binary Tree

  13. Flip Binary Tree to Match Preorder Traversal

HEAP

  1. Advantage Shuffle

  2. The K Weakest Rows in a Matrix

HASHMAP / HASHSET

  1. 3 Sum with Multiplicity

  2. Vowel Spellchecker

  3. Design Underground System

  4. Design HashMap

  5. Distribute Candies

  6. Replace the Substring for Balaced String

  7. Number of Submatrices That sum to Target

  8. K-diff Pairs in an Array

  9. 4 Sum II

LINKED LIST

  1. Add two numbers in Linked list

  2. Merge two Sorted Lists

  3. Linked List Cycle

  4. Linked List Cycle II

  5. Merge k sorted lists

  6. Swapping Nodes in a Linked List

  7. Intersection of Two Linked Lists

  8. Swap Nodes in Pairs

  9. Copy List with Random Pointer

  10. Partition List

  11. Remove Nth Node From End of the List

GENERAL

  1. Boats to save people

  2. Reach a Number

  3. Number of 1 Bits

  4. Simplify Path

  5. Concatenation of Consecutive Binary Numbers

  6. Next Permutation

  7. Largest Rectangle in Histogram

  8. Reordered Power of 2

  9. Generate Random Point in a Circle

  10. Minimum Elements to Add to Form a Given Sum

  11. Reconstruct Origial Digits from English

  12. Global and Local Inversions

GRAPH

  1. Pacific Atlantic Water Flow

DYNAMIC PROGRAMMING

  1. 0/1 Knapsack Problem

  2. Arithmetic Slices

  3. Best Time to Buy and Sell Stock

  4. Best Time to Buy and Sell Stock II

  5. Best Time to Buy and Sell Stock III

  6. Best Time to Buy and Sell Stock IV

  7. Best Time to Buy and Sell Stock V

  8. Best Time to Buy and Sell Stock with cooldown

  9. Best Time to Buy and Sell Stock with Transaction Fee

  10. Ones and Zeroes

  11. Increasing Triplet Subsequenc

  12. Longest Harmonious Subsequence

  13. Coin Change

  14. Decode Ways

  15. Edit Distance

  16. Minimum Number of Operations to Move all Balls to Each Box

  17. Maximum Subarray / Kadane's Algorithm

  18. Russian Doll Envelopes

STACK / QUEUE

  1. Keys and Rooms

  2. Find the most cometetive subsequence

  3. Maximum Frequency Stack

  4. Minimum Remove to Make Valid Parentheses

  5. Validate Stack Sequences

  6. Convert BST to Greater Tree

  7. Flatten Nest List Iterator

RECURSION

  1. Maximum Score from Performing Multiplication Operation

  2. Search a 2D Matrix II

  3. Letter Case Permutaiton

  4. Remove All Adjacent Duplicates in String II

BREADTH FIRST SEARCH

  1. Map of Highest Peak

  2. Is Graph Bipartite?

  3. Shortest Path in Binary Matrix

DEPTH FIRST SEARCH

  1. Longest Increasing Path in Matrix

  2. Letter Combinations of a Phone Number

TRIE

  1. Design Add and Search Word Data Structure

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