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Time Complexity

NESTED_CMPL3 Math Amazon

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LOOP_CMPL Basic primer Amazon

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Storage Scalability

Design Cache Amazon Facebook Google Ola Cabs

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Highly Available Database Amazon Facebook

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Sharding a Database Amazon Dropbox

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Probability

Distribution Percentage Normal and Continuous Distribution Amazon statistics

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Arrays

Rotate Matrix Arrangement Google Facebook Amazon Zoho

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Max Sum Contiguous Subarray Array Math Facebook Paypal Yahoo Microsoft LinkedIn Amazon Goldman Sachs Deloitte DE Shaw

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Find Duplicate in Array Bucketing Amazon VMWare Riverbed Microsoft

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Merge Intervals Value ranges Google Amazon

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Spiral Order Matrix I Simulation array Microsoft JP Morgan Amazon Flipkart Adobe Wipro

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Repeat and Missing Number Array Missing / Repeated number Amazon

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Merge Overlapping Intervals Value ranges Google Amazon Directi Fab

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Set Matrix Zeros Space recycle Oracle Amazon Facebook Paytm

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Spiral Order Matrix II Simulation array Microsoft JP Morgan Amazon

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Largest Number Arrangement Amazon Goldman Sachs Microsoft

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First Missing Integer Missing / Repeated number Space recycle Model N InMobi Amazon Microsoft Deloitte FreeCharge Goldman Sachs LIDO learning Mygate walmart DE Shaw

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Pascal Triangle Simulation array Google Amazon

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Max Distance Sorting Google Amazon Microsoft

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Next Permutation Arrangement Microsoft Amazon

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Wave Array Sorting Google Adobe Amazon Zoho

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Hotel Bookings Possible Sorting Goldman Sachs Microsoft Amazon

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Min Steps in Infinite Grid Array Math Directi Amazon

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Flip Array Math VMWare Microsoft Amazon

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Find Permutation Arrangement Goldman Sachs Amazon

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Maximum Absolute Difference Array Math Amazon

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Maximum Unsorted Subarray Sorting Amazon Microsoft

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Reorder Data in Log Files Sorting Amazon sorting strings

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Make equal elements Array Simulation array Amazon arrays

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System Design Concepts

Design URL Shortener Amazon Directi Zenefits Facebook

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Design Messenger Amazon Amazon Lab126 Facebook Google Twitter

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Math

Excel Column Number Base conversion Amazon

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Excel Column Title Base conversion Amazon

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Grid Unique Paths Combinatorics Google Amazon Microsoft Adobe

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Power Of Two Integers Adhoc Housing Amazon

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K-th Permutation Combinatorics Amazon Math

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Descriptive Statistics

Find Variance Array Measures of Variability Amazon statistics

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Binary Search

Matrix Search Simple binary search Amazon

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Median of Array Sort modification Amazon VMWare Google Microsoft Goldman Sachs Trifacta Hike

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Square Root of Integer Search answer Facebook Amazon Microsoft

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Rotated Sorted Array Search Sort modification Facebook Google Microsoft Amazon

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Painter's Partition Problem Search answer Google Codenation Amazon

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Matrix Median Search answer Amazon

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Capacity To Ship Packages Within B Days Search answer Amazon Binary Search

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Strings

Implement StrStr String Search Facebook Amazon Qualcomm Wipro Microsoft

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Integer To Roman String math Amazon Facebook Microsoft Twitter

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Roman To Integer String math Amazon Facebook Microsoft Twitter

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Length of Last Word Words Amazon

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Atoi String parsing Adobe Nvidia Agilent systems Bloomberg Amazon Apple Microsoft Groupon

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Valid Ip Addresses String parsing Amazon Microsoft

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Compare Version Numbers String parsing Intuit Amazon

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Longest Palindromic Substring string Tricks Amazon Microsoft Groupon

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Count And Say string Simulation Facebook Amazon Microsoft

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Reverse the String Words Qualcomm Amazon Microsoft Cisco Facebook Twitter

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Power of 2 String math Amazon

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Minimum Characters required to make a String Palindromic string Tricks Amazon Microsoft

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Convert to Palindrome string Tricks Amazon strings

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Bulls and Cows string Simulation Amazon strings hashing

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Bit Manipulation

Reverse Bits Bit play Nvidia HCL Amazon

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Single Number Bit array Amazon sharechat toppr Uber Technologies Inc Twitter

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Divide Integers Bit play Microsoft Amazon

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Single Number II Bit array Google Amazon

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Count Total Set Bits Bit tricks Amazon

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Palindromic Binary Representation Bit tricks Amazon

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Two Pointers

Merge Two Sorted Lists II Multiple arrays Adobe Expedia Microsoft Amazon

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3 Sum Sorting Facebook Amazon Microsoft

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Remove Duplicates from Sorted Array Inplace Update United Healthgroup Amazon Google Microsoft Expedia

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Container With Most Water Tricks Facebook Google Amazon Adobe

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Remove Element from Array Inplace Update Amazon

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Max Continuous Series of 1s Tricks VMWare Amazon

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Pair With Given Difference Sorting Amazon Flipkart Two Pointers hashing

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Maximum Ones After Modification Tricks Amazon hotstar Two Pointers

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Linked Lists

Swap List Nodes in pairs pointer move Microsoft Amazon Moonfrog Labs

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Rotate List pointer move Amazon

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Reorder List list trick Amazon Microsoft

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Merge Two Sorted Lists List 2 pointer Microsoft Yahoo Amazon

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Remove Duplicates from Sorted List List 2 pointer Microsoft VMWare goldmann sachs Amazon

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Add Two Numbers as Lists List math Amazon Qualcomm Microsoft Facebook

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Remove Nth Node from List End List 2 pointer HCL Amazon

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List Cycle List math Amazon Microsoft NetApp

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Intersection of Linked Lists List 2 pointer Amazon Microsoft NetApp Apache Design

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Reverse Link List II list trick Facebook Microsoft Amazon

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Palindrome List List 2 pointer Amazon Microsoft

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K reverse linked list pointer move Microsoft Amazon Linked Lists

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Reverse Alternate K Nodes list trick Amazon LeanApps Linked Lists

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Kth Node From Middle list trick Amazon

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Sort Binary Linked List List sort Amazon

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Even Reverse pointer move Amazon

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Stacks And Queues

Rain Water Trapped Stack math Qualcomm Amazon Microsoft Goldman Sachs

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Generate all Parentheses Stack simple Amazon

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Largest Rectangle in Histogram cleverstack Google Facebook Amazon OLX Group

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Sliding Window Maximum Queue Google Chronus Walmart labs Amazon Microsoft

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Min Stack Stack simple Yahoo Amazon Adobe Microsoft Grab Twitter

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Redundant Braces Stack simple Amazon

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Nearest Smaller Element cleverstack Amazon Microsoft

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First non-repeating character in a stream of characters Queue Amazon Flipkart

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Balanced Parantheses! Stack simple Amazon Google stack

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Backtracking

Kth Permutation Sequence Maths and backtracking Amazon

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Combination Sum Subsets Facebook Amazon Adobe

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Combination Sum II Subsets Microsoft Amazon Infosys

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NQueens Game solving Qualcomm Google Amazon

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Combinations Subsets Amazon Adobe

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Subsets II Subsets Amazon Microsoft

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Subset Subsets Amazon Microsoft

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Palindrome Partitioning Bruteforce builder Amazon Google

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Hashing

Longest Consecutive Sequence Amazon Google Directi Flipkart Tower Research Capital Uber Technologies Inc

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4 Sum Hash Search Amazon Google

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Anagrams Key formation Amazon Microsoft Goldman Sachs Deloitte

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Fraction Maths and hashing Amazon Microsoft

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Points on the Straight Line Maths and hashing Google Amazon InMobi

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2 Sum Hash Search Facebook Amazon Google

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Valid Sudoku Hash Search Google Amazon

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Copy List Key formation Amazon Microsoft

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Longest Substring Without Repeat Hashing two pointer Amazon

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Heaps And Maps

Merge K Sorted Lists heap Flipkart Amazon Google

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LRU Cache Map Adobe Citigroup Amazon Microsoft

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INVERSIONS Amazon

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Distinct Numbers in Window Map Amazon

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Maximum Sum Combinations heap Amazon Liv.ai sorting Heaps hashing

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K Largest Elements heap Amazon Delhivery Flipkart heap

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Tree Data Structure

Inorder Traversal Traversal Amazon Microsoft grofers

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Recover Binary Search Tree BST traversal Microsoft Amazon

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Inorder Traversal of Cartesian Tree Tree construction Amazon Facebook

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Least Common Ancestor Tree search Facebook Adobe Microsoft Amazon Google

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Construct Binary Tree From Inorder And Preorder Tree construction Amazon Microsoft

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Flatten Binary Tree to Linked List LinkedList tree Adobe Amazon Microsoft

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Valid Binary Search Tree Simple tree ops Amazon Facebook

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Preorder Traversal Traversal Amazon Microsoft

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Binary Tree From Inorder And Postorder Tree construction Amazon Microsoft

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Balanced Binary Tree Simple tree ops Amazon

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Sorted Array To Balanced BST Tree construction VMWare Amazon

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Symmetric Binary Tree 2 trees Amazon Zomato

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Postorder Traversal Traversal Amazon Microsoft juspay

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Populate Next Right Pointers Tree level order Microsoft Amazon

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Identical Binary Trees 2 trees Amazon

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BST Iterator BST traversal Apple Amazon Facebook

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ZigZag Level Order Traversal BT level order Amazon Microsoft

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Path Sum Root to leaf Microsoft Yahoo Amazon DE Shaw

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Next Pointer Binary Tree Microsoft Amazon

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Min Depth of Binary Tree Root to leaf Facebook Amazon

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Root to Leaf Paths With Sum Root to leaf Microsoft Yahoo Amazon

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Kth Smallest Element In Tree BST traversal Amazon

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2-Sum Binary Tree BST traversal Amazon

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Vertical Order traversal of Binary Tree Traversal Amazon Grab infoworks Microsoft

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Diagonal Traversal Traversal Amazon DE Shaw dfs binary tree

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Cousins in Binary Tree level order Amazon DE Shaw binary tree

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Path to Given Node Simple tree ops Amazon binary tree

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Remove Half Nodes Simple tree ops Amazon binary tree

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Merge two Binary Tree 2 trees Amazon binary tree

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Maximum Edge Removal Simple tree ops Amazon dfs connected component

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Burn a Tree Root to leaf Hippocabs Amazon binary tree

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Nodes at Distance K Simple tree ops Amazon binary tree

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Vertical Sum of a Binary Tree Traversal Amazon binary tree

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Covered / Uncovered Nodes Traversal Amazon tree binary tree

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Dynamic Programming

Longest Increasing Subsequence Simple array DP Facebook Yahoo Epic systems Amazon Microsoft deshaw

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Unique Binary Search Trees DP optimized backtrack Amazon Twitter Samsung Directi tower research

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Max Product Subarray Suffix / prefix DP Amazon LinkedIn Microsoft

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Ways to Decode Simple array DP Facebook Amazon NoBroker.com OLX Group

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Best Time to Buy and Sell Stocks II Adhoc Amazon Facebook

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Best Time to Buy and Sell Stocks III DP tricky Amazon Facebook

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Best Time to Buy and Sell Stocks I Suffix / prefix DP Amazon Facebook

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Max Sum Path in Binary Tree tree DP Directi Amazon

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Palindrome Partitioning II Breaking words Amazon Google Tower Research Capital

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Min Sum Path in Matrix Matrix DP Amazon Flipkart goldmann sachs thought works

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Min Jumps Array Greedy OR DP Amazon Ebay Google

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Edit Distance 2D string DP Google LinkedIn Microsoft Amazon Flipkart Ola PubMatic

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Unique Binary Search Trees II Multiply DP Amazon Twitter Samsung Directi

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Jump Game Array Greedy OR DP Amazon Ebay

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Stairs Simple array DP Morgan Stanley Amazon Intel Goldman Sachs

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Evaluate Expression To True DP tricky Amazon

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Arrange II Suffix / prefix DP Amazon

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Equal Average Partition Knapsack Amazon

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Maximum Path in Triangle Matrix DP Amazon easy dp

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0-1 Knapsack Knapsack Amazon deshaw 0/1 knapsack dp

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Chain of Pairs Derived DP Amazon Directi dp

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Potions DP Amazon dynamic programming

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Greedy Algorithm

Gas Station Medium Greedy Bloomberg Google DE Shaw Amazon Flipkart Microsoft

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Majority Element Medium Greedy Microsoft Yahoo Google Amazon

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Distribute Candy Medium Greedy Microsoft Flipkart Amazon

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Highest Product Easy Greedy Coursera Amazon

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Assign Mice to Holes Medium Greedy Amazon

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Meeting rooms Medium Greedy Amazon ajio Apple Fab Flipkart Microsoft greedy

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Graph Data Structure & Algorithms

Clone Graph graph hashing Google Facebook Amazon

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Word Search Board graph traversal Epic systems Amazon Google infoworks

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Stepping Numbers graph traversal Epic systems Amazon

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Black Shapes graph connectivity Amazon

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Knight On Chess Board Shortest path Goldman Sachs Amazon Tower Research Capital

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Smallest Multiple With 0 and 1 BFS Amazon

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Commutable Islands graph connectivity Amazon

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Possibility of finishing all courses given pre-requisites graph connectivity Amazon Flipkart Grab infoworks Zenefits Depth first search

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Valid Path BFS Morgan Stanley Amazon Codenation Directi

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Cycle in Directed Graph Depth first search Amazon Morgan Stanley dfs graphs easy

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Cycle in Undirected Graph graph connectivity Amazon graphs easy dsu

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Snake Ladder Problem! BFS Amazon bfs

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Region in BinaryMatrix BFS Amazon graphs easy bfs

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Path in Matrix BFS Amazon dfs/bfs graph matrix

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Puzzles

Monkeys and Doors Math Amazon

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The Tribe Logical deduction Amazon

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Prisoners and Poison Math Amazon

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Light Switches in the Cellar Game Amazon

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Next Number II Math Amazon

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