Interview Prep/Companies/PayPal

PayPal

100 questions tracked94 with solutions

🔍

Frequency scoreSorted highest → lowest frequency✓ Our Solution = we have a detailed walkthrough

Showing 100 of 100 questions

MediumZigzag Conversion✓ Our Solution

100

String

LeetCode ↗52% acc.

MediumLRU Cache✓ Our Solution

Hash TableLinked ListDesignDoubly-Linked List

LeetCode ↗45% acc.

HardMinimum Replacements to Sort the Array✓ Our Solution

ArrayMathGreedy

LeetCode ↗53% acc.

MediumCount Vowel Strings in Ranges✓ Our Solution

ArrayStringPrefix Sum

LeetCode ↗68% acc.

EasyCount the Number of Vowel Strings in Range✓ Our Solution

ArrayStringCounting

LeetCode ↗74% acc.

MediumMeeting Scheduler

ArrayTwo PointersSorting

LeetCode ↗55% acc.

MediumMaximum Number of Integers to Choose From a Range I✓ Our Solution

ArrayHash TableBinary SearchGreedy+1

LeetCode ↗68% acc.

HardNumber of Valid Move Combinations On Chessboard✓ Our Solution

ArrayStringBacktrackingSimulation

LeetCode ↗48% acc.

MediumWord Search✓ Our Solution

ArrayStringBacktrackingDepth-First Search+1

LeetCode ↗45% acc.

MediumTime Needed to Rearrange a Binary String✓ Our Solution

StringDynamic ProgrammingSimulation

LeetCode ↗52% acc.

MediumNumber of Islands✓ Our Solution

ArrayDepth-First SearchBreadth-First SearchUnion Find+1

LeetCode ↗62% acc.

HardMaximum Frequency Score of a Subarray

ArrayHash TableMathStack+1

LeetCode ↗35% acc.

MediumMinimum Non-Zero Product of the Array Elements✓ Our Solution

MathGreedyRecursion

LeetCode ↗36% acc.

MediumMaximum Number of Integers to Choose From a Range II

ArrayBinary SearchGreedySorting

LeetCode ↗35% acc.

HardPaint House III✓ Our Solution

ArrayDynamic Programming

LeetCode ↗61% acc.

MediumMaximum Sum Obtained of Any Permutation✓ Our Solution

ArrayGreedySortingPrefix Sum

LeetCode ↗39% acc.

HardCount Array Pairs Divisible by K✓ Our Solution

ArrayMathNumber Theory

LeetCode ↗30% acc.

MediumSmallest Greater Multiple Made of Two Digits

MathEnumeration

LeetCode ↗48% acc.

EasyBest Time to Buy and Sell Stock✓ Our Solution

ArrayDynamic Programming

LeetCode ↗55% acc.

MediumGroup Anagrams✓ Our Solution

ArrayHash TableStringSorting

LeetCode ↗71% acc.

MediumLongest Increasing Subsequence✓ Our Solution

ArrayBinary SearchDynamic Programming

LeetCode ↗58% acc.

MediumMaximal Square✓ Our Solution

ArrayDynamic ProgrammingMatrix

LeetCode ↗49% acc.

EasyTwo Sum✓ Our Solution

ArrayHash Table

LeetCode ↗56% acc.

MediumProduct of Array Except Self✓ Our Solution

ArrayPrefix Sum

LeetCode ↗68% acc.

MediumCoin Change✓ Our Solution

ArrayDynamic ProgrammingBreadth-First Search

LeetCode ↗46% acc.

MediumPairs of Songs With Total Durations Divisible by 60✓ Our Solution

ArrayHash TableCounting

LeetCode ↗53% acc.

MediumLongest Substring Without Repeating Characters✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗37% acc.

EasyMinimum Absolute Difference✓ Our Solution

ArraySorting

LeetCode ↗71% acc.

MediumMerge Intervals✓ Our Solution

ArraySorting

LeetCode ↗49% acc.

EasyMerge Sorted Array✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗53% acc.

MediumSubarray Sum Equals K✓ Our Solution

ArrayHash TablePrefix Sum

LeetCode ↗45% acc.

MediumFind the Smallest Divisor Given a Threshold✓ Our Solution

ArrayBinary Search

LeetCode ↗64% acc.

MediumMaximum Number of Events That Can Be Attended✓ Our Solution

ArrayGreedySortingHeap (Priority Queue)

LeetCode ↗33% acc.

MediumLoud and Rich✓ Our Solution

ArrayDepth-First SearchGraphTopological Sort

LeetCode ↗62% acc.

MediumReorganize String✓ Our Solution

Hash TableStringGreedySorting+2

LeetCode ↗56% acc.

EasyValid Anagram✓ Our Solution

Hash TableStringSorting

LeetCode ↗67% acc.

EasyCount Vowel Substrings of a String✓ Our Solution

Hash TableString

LeetCode ↗71% acc.

EasyValid Parentheses✓ Our Solution

StringStack

LeetCode ↗42% acc.

HardTrapping Rain Water✓ Our Solution

ArrayTwo PointersDynamic ProgrammingStack+1

LeetCode ↗65% acc.

MediumHouse Robber✓ Our Solution

ArrayDynamic Programming

LeetCode ↗52% acc.

HardMeeting Rooms III✓ Our Solution

ArrayHash TableSortingHeap (Priority Queue)+1

LeetCode ↗44% acc.

MediumRandom Pick with Weight✓ Our Solution

ArrayMathBinary SearchPrefix Sum+1

LeetCode ↗48% acc.

MediumSort Colors✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗68% acc.

EasyLast Stone Weight✓ Our Solution

ArrayHeap (Priority Queue)

LeetCode ↗66% acc.

MediumTop K Frequent Elements✓ Our Solution

ArrayHash TableDivide and ConquerSorting+4

LeetCode ↗65% acc.

MediumMinimum Increment to Make Array Unique✓ Our Solution

ArrayGreedySortingCounting

LeetCode ↗60% acc.

MediumMaximum Subarray✓ Our Solution

ArrayDivide and ConquerDynamic Programming

LeetCode ↗52% acc.

HardMedian of Two Sorted Arrays✓ Our Solution

ArrayBinary SearchDivide and Conquer

LeetCode ↗44% acc.

MediumKth Largest Element in an Array✓ Our Solution

ArrayDivide and ConquerSortingHeap (Priority Queue)+1

LeetCode ↗68% acc.

MediumRotate Image✓ Our Solution

ArrayMathMatrix

LeetCode ↗78% acc.

MediumKoko Eating Bananas✓ Our Solution

ArrayBinary Search

LeetCode ↗49% acc.

MediumPalindromic Substrings✓ Our Solution

Two PointersStringDynamic Programming

LeetCode ↗72% acc.

MediumJump Game✓ Our Solution

ArrayDynamic ProgrammingGreedy

LeetCode ↗39% acc.

HardText Justification✓ Our Solution

ArrayStringSimulation

LeetCode ↗48% acc.

MediumMinimum Number of Swaps to Make the String Balanced✓ Our Solution

Two PointersStringStackGreedy

LeetCode ↗78% acc.

Medium3Sum Smaller

ArrayTwo PointersBinary SearchSorting

LeetCode ↗51% acc.

MediumCount and Say✓ Our Solution

String

LeetCode ↗61% acc.

MediumSubarray Product Less Than K✓ Our Solution

ArrayBinary SearchSliding WindowPrefix Sum

LeetCode ↗53% acc.

EasyReverse Linked List✓ Our Solution

Linked ListRecursion

LeetCode ↗79% acc.

EasyHappy Number✓ Our Solution

Hash TableMathTwo Pointers

LeetCode ↗58% acc.

MediumFind First and Last Position of Element in Sorted Array✓ Our Solution

ArrayBinary Search

LeetCode ↗47% acc.

MediumSearch in Rotated Sorted Array✓ Our Solution

ArrayBinary Search

LeetCode ↗43% acc.

EasyDegree of an Array✓ Our Solution

ArrayHash Table

LeetCode ↗57% acc.

MediumValid Sudoku✓ Our Solution

ArrayHash TableMatrix

LeetCode ↗62% acc.

MediumFlatten Deeply Nested Array✓ Our Solution

LeetCode ↗64% acc.

HardLFU Cache✓ Our Solution

Hash TableLinked ListDesignDoubly-Linked List

LeetCode ↗47% acc.

Medium3Sum✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗37% acc.

MediumLongest Consecutive Sequence✓ Our Solution

ArrayHash TableUnion Find

LeetCode ↗47% acc.

MediumMeeting Rooms II

ArrayTwo PointersGreedySorting+2

LeetCode ↗52% acc.

EasySquares of a Sorted Array✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗73% acc.

MediumCourse Schedule✓ Our Solution

Depth-First SearchBreadth-First SearchGraphTopological Sort

LeetCode ↗49% acc.

MediumSearch a 2D Matrix II✓ Our Solution

ArrayBinary SearchDivide and ConquerMatrix

LeetCode ↗55% acc.

HardMaximum Profit in Job Scheduling✓ Our Solution

ArrayBinary SearchDynamic ProgrammingSorting

LeetCode ↗54% acc.

MediumSpiral Matrix✓ Our Solution

ArrayMatrixSimulation

LeetCode ↗54% acc.

MediumFlatten Binary Tree to Linked List✓ Our Solution

Linked ListStackTreeDepth-First Search+1

LeetCode ↗69% acc.

HardFind Median from Data Stream✓ Our Solution

Two PointersDesignSortingHeap (Priority Queue)+1

LeetCode ↗53% acc.

EasyFind Pivot Index✓ Our Solution

ArrayPrefix Sum

LeetCode ↗61% acc.

EasyPath Sum✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗53% acc.

MediumMaximum Product Subarray✓ Our Solution

ArrayDynamic Programming

LeetCode ↗35% acc.

EasyLexicographically Smallest Palindrome✓ Our Solution

Two PointersStringGreedy

LeetCode ↗79% acc.

EasyMaximum Population Year✓ Our Solution

ArrayCountingPrefix Sum

LeetCode ↗63% acc.

MediumMin Stack✓ Our Solution

StackDesign

LeetCode ↗56% acc.

HardWord Search II✓ Our Solution

ArrayStringBacktrackingTrie+1

LeetCode ↗37% acc.

MediumDelete Node in a Linked List✓ Our Solution

Linked List

LeetCode ↗82% acc.

HardMinimum Window Substring✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗45% acc.

EasyFirst Unique Character in a String✓ Our Solution

Hash TableStringQueueCounting

LeetCode ↗64% acc.

HardMaximum Frequency Stack✓ Our Solution

Hash TableStackDesignOrdered Set

LeetCode ↗66% acc.

MediumInvalid Transactions✓ Our Solution

ArrayHash TableStringSorting

LeetCode ↗31% acc.

MediumContainer With Most Water✓ Our Solution

ArrayTwo PointersGreedy

LeetCode ↗58% acc.

MediumProcess Tasks Using Servers✓ Our Solution

ArrayHeap (Priority Queue)

LeetCode ↗41% acc.

MediumFind Peak Element✓ Our Solution

ArrayBinary Search

LeetCode ↗47% acc.

EasyIntersection of Two Arrays✓ Our Solution

ArrayHash TableTwo PointersBinary Search+1

LeetCode ↗76% acc.

MediumFind Minimum in Rotated Sorted Array✓ Our Solution

ArrayBinary Search

LeetCode ↗53% acc.

HardMinimum Number of Removals to Make Mountain Array✓ Our Solution

ArrayBinary SearchDynamic ProgrammingGreedy

LeetCode ↗55% acc.

MediumDivide Players Into Teams of Equal Skill✓ Our Solution

ArrayHash TableTwo PointersSorting

LeetCode ↗69% acc.

MediumJump Game II✓ Our Solution

ArrayDynamic ProgrammingGreedy

LeetCode ↗42% acc.

MediumNumber of Substrings Containing All Three Characters✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗73% acc.

HardFirst Missing Positive✓ Our Solution

ArrayHash Table

LeetCode ↗41% acc.

MediumMerge In Between Linked Lists✓ Our Solution

Linked List

LeetCode ↗82% acc.

100

MediumDesign Twitter✓ Our Solution

Hash TableLinked ListDesignHeap (Priority Queue)

LeetCode ↗43% acc.