Interview Prep/Companies/Google

Google

100 questions tracked79 with solutions

🔍

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

Showing 100 of 100 questions

EasyTwo Sum✓ Our Solution

100

ArrayHash Table

LeetCode ↗56% acc.

MediumAdd Two Numbers✓ Our Solution

Linked ListMathRecursion

LeetCode ↗46% acc.

HardTrapping Rain Water✓ Our Solution

ArrayTwo PointersDynamic ProgrammingStack+1

LeetCode ↗65% acc.

HardMedian of Two Sorted Arrays✓ Our Solution

ArrayBinary SearchDivide and Conquer

LeetCode ↗44% acc.

MediumLongest Substring Without Repeating Characters✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗37% acc.

EasyLongest Common Prefix✓ Our Solution

StringTrie

LeetCode ↗45% acc.

EasyValid Parentheses✓ Our Solution

StringStack

LeetCode ↗42% acc.

MediumLongest Consecutive Sequence✓ Our Solution

ArrayHash TableUnion Find

LeetCode ↗47% acc.

MediumMaximum Subarray✓ Our Solution

ArrayDivide and ConquerDynamic Programming

LeetCode ↗52% acc.

MediumRotate Image✓ Our Solution

ArrayMathMatrix

LeetCode ↗78% acc.

MediumSearch in Rotated Sorted Array✓ Our Solution

ArrayBinary Search

LeetCode ↗43% acc.

EasyReverse Linked List✓ Our Solution

Linked ListRecursion

LeetCode ↗79% acc.

Medium4Sum✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗38% acc.

MediumJump Game✓ Our Solution

ArrayDynamic ProgrammingGreedy

LeetCode ↗39% acc.

MediumGroup Anagrams✓ Our Solution

ArrayHash TableStringSorting

LeetCode ↗71% acc.

HardFind Median from Data Stream✓ Our Solution

Two PointersDesignSortingHeap (Priority Queue)+1

LeetCode ↗53% acc.

EasyPascal's Triangle✓ Our Solution

ArrayDynamic Programming

LeetCode ↗77% acc.

EasySingle Number✓ Our Solution

ArrayBit Manipulation

LeetCode ↗76% acc.

EasyFind the Index of the First Occurrence in a String✓ Our Solution

Two PointersStringString Matching

LeetCode ↗45% acc.

HardMaximal Rectangle✓ Our Solution

ArrayDynamic ProgrammingStackMatrix+1

LeetCode ↗54% acc.

EasyValid Anagram✓ Our Solution

Hash TableStringSorting

LeetCode ↗67% acc.

HardFirst Missing Positive✓ Our Solution

ArrayHash Table

LeetCode ↗41% acc.

MediumJump Game II✓ Our Solution

ArrayDynamic ProgrammingGreedy

LeetCode ↗42% acc.

EasyAdd Binary✓ Our Solution

MathStringBit ManipulationSimulation

LeetCode ↗56% acc.

HardText Justification✓ Our Solution

ArrayStringSimulation

LeetCode ↗48% acc.

MediumInsert Interval✓ Our Solution

Array

LeetCode ↗43% acc.

MediumMaximum Product Subarray✓ Our Solution

ArrayDynamic Programming

LeetCode ↗35% acc.

MediumString to Integer (atoi)✓ Our Solution

String

LeetCode ↗19% acc.

EasySame Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗65% acc.

MediumSearch a 2D Matrix✓ Our Solution

ArrayBinary SearchMatrix

LeetCode ↗52% acc.

EasyIsomorphic Strings✓ Our Solution

Hash TableString

LeetCode ↗47% acc.

Medium3Sum Closest✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗47% acc.

HardWildcard Matching✓ Our Solution

StringDynamic ProgrammingGreedyRecursion

LeetCode ↗30% acc.

MediumFind the Duplicate Number✓ Our Solution

ArrayTwo PointersBinary SearchBit Manipulation

LeetCode ↗63% acc.

EasyContains Duplicate II✓ Our Solution

ArrayHash TableSliding Window

LeetCode ↗49% acc.

EasyMissing Number✓ Our Solution

ArrayHash TableMathBinary Search+2

LeetCode ↗70% acc.

EasySymmetric Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗59% acc.

MediumMinimum Path Sum✓ Our Solution

ArrayDynamic ProgrammingMatrix

LeetCode ↗66% acc.

MediumKth Smallest Element in a BST✓ Our Solution

TreeDepth-First SearchBinary Search TreeBinary Tree

LeetCode ↗75% acc.

MediumCopy List with Random Pointer✓ Our Solution

Hash TableLinked List

LeetCode ↗61% acc.

HardNumber of Islands II

ArrayHash TableUnion Find

LeetCode ↗40% acc.

MediumClone Graph✓ Our Solution

Hash TableDepth-First SearchBreadth-First SearchGraph

LeetCode ↗62% acc.

MediumInteger to Roman✓ Our Solution

Hash TableMathString

LeetCode ↗69% acc.

HardShortest Palindrome✓ Our Solution

StringRolling HashString MatchingHash Function

LeetCode ↗41% acc.

MediumFlatten Binary Tree to Linked List✓ Our Solution

Linked ListStackTreeDepth-First Search+1

LeetCode ↗69% acc.

MediumGroup Shifted Strings

ArrayHash TableString

LeetCode ↗67% acc.

HardWord Search II✓ Our Solution

ArrayStringBacktrackingTrie+1

LeetCode ↗37% acc.

MediumBinary Tree Right Side View✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗67% acc.

MediumSubsets II✓ Our Solution

ArrayBacktrackingBit Manipulation

LeetCode ↗60% acc.

HardThe Skyline Problem✓ Our Solution

ArrayDivide and ConquerBinary Indexed TreeSegment Tree+3

LeetCode ↗44% acc.

EasyImplement Stack using Queues✓ Our Solution

StackDesignQueue

LeetCode ↗67% acc.

MediumBest Time to Buy and Sell Stock with Cooldown✓ Our Solution

ArrayDynamic Programming

LeetCode ↗60% acc.

EasyMissing Ranges

Array

LeetCode ↗35% acc.

MediumGraph Valid Tree

Depth-First SearchBreadth-First SearchUnion FindGraph

LeetCode ↗49% acc.

MediumSecond Highest Salary✓ Our Solution

Database

LeetCode ↗44% acc.

MediumBasic Calculator II✓ Our Solution

MathStringStack

LeetCode ↗46% acc.

MediumGame of Life✓ Our Solution

ArrayMatrixSimulation

LeetCode ↗71% acc.

MediumFraction to Recurring Decimal✓ Our Solution

Hash TableMathString

LeetCode ↗26% acc.

HardNumber of Digit One✓ Our Solution

MathDynamic ProgrammingRecursion

LeetCode ↗36% acc.

MediumWalls and Gates

ArrayBreadth-First SearchMatrix

LeetCode ↗63% acc.

EasyBinary Tree Paths✓ Our Solution

StringBacktrackingTreeDepth-First Search+1

LeetCode ↗67% acc.

MediumWiggle Sort

ArrayGreedySorting

LeetCode ↗68% acc.

HardBest Time to Buy and Sell Stock IV✓ Our Solution

ArrayDynamic Programming

LeetCode ↗47% acc.

Medium3Sum Smaller

ArrayTwo PointersBinary SearchSorting

LeetCode ↗51% acc.

MediumCombinations✓ Our Solution

Backtracking

LeetCode ↗73% acc.

MediumLowest Common Ancestor of a Binary Search Tree✓ Our Solution

TreeDepth-First SearchBinary Search TreeBinary Tree

LeetCode ↗68% acc.

HardRead N Characters Given read4 II - Call Multiple Times

ArraySimulationInteractive

LeetCode ↗43% acc.

MediumPaint Fence

Dynamic Programming

LeetCode ↗48% acc.

MediumLongest Substring with At Most Two Distinct Characters

Hash TableStringSliding Window

LeetCode ↗56% acc.

EasyFlip Game

String

LeetCode ↗65% acc.

EasyBinary Tree Postorder Traversal✓ Our Solution

StackTreeDepth-First SearchBinary Tree

LeetCode ↗76% acc.

EasyStrobogrammatic Number

Hash TableTwo PointersString

LeetCode ↗48% acc.

MediumZigzag Iterator

ArrayDesignQueueIterator

LeetCode ↗66% acc.

MediumSpiral Matrix II✓ Our Solution

ArrayMatrixSimulation

LeetCode ↗73% acc.

MediumPeeking Iterator✓ Our Solution

ArrayDesignIterator

LeetCode ↗60% acc.

HardDepartment Top Three Salaries✓ Our Solution

Database

LeetCode ↗58% acc.

HardClosest Binary Search Tree Value II

Two PointersStackTreeDepth-First Search+3

LeetCode ↗60% acc.

MediumFlatten 2D Vector

ArrayTwo PointersDesignIterator

LeetCode ↗50% acc.

MediumUnique Word Abbreviation

ArrayHash TableStringDesign

LeetCode ↗27% acc.

MediumFlip Game II

MathDynamic ProgrammingBacktrackingMemoization+1

LeetCode ↗52% acc.

EasyPalindrome Permutation

Hash TableStringBit Manipulation

LeetCode ↗69% acc.

HardScramble String✓ Our Solution

StringDynamic Programming

LeetCode ↗42% acc.

MediumInsertion Sort List✓ Our Solution

Linked ListSorting

LeetCode ↗56% acc.

MediumFactorial Trailing Zeroes✓ Our Solution

Math

LeetCode ↗45% acc.

MediumRemove Duplicates from Sorted List II✓ Our Solution

Linked ListTwo Pointers

LeetCode ↗50% acc.

MediumPopulating Next Right Pointers in Each Node✓ Our Solution

Linked ListTreeDepth-First SearchBreadth-First Search+1

LeetCode ↗65% acc.

EasyWord Pattern✓ Our Solution

Hash TableString

LeetCode ↗43% acc.

HardN-Queens II✓ Our Solution

Backtracking

LeetCode ↗77% acc.

EasyMinimum Depth of Binary Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗51% acc.

MediumBitwise AND of Numbers Range✓ Our Solution

Bit Manipulation

LeetCode ↗48% acc.

MediumRank Scores✓ Our Solution

Database

LeetCode ↗65% acc.

HardValid Number✓ Our Solution

String

LeetCode ↗22% acc.

EasyRead N Characters Given Read4

ArraySimulationInteractive

LeetCode ↗42% acc.

MediumGray Code✓ Our Solution

MathBacktrackingBit Manipulation

LeetCode ↗62% acc.

HardRemove Invalid Parentheses✓ Our Solution

StringBacktrackingBreadth-First Search

LeetCode ↗49% acc.

HardFind Minimum in Rotated Sorted Array II✓ Our Solution

ArrayBinary Search

LeetCode ↗44% acc.

MediumFind the Celebrity

Two PointersGraphInteractive

LeetCode ↗48% acc.

MediumRange Sum Query - Mutable✓ Our Solution

ArrayDesignBinary Indexed TreeSegment Tree

LeetCode ↗42% acc.

MediumBinary Tree Level Order Traversal II✓ Our Solution

TreeBreadth-First SearchBinary Tree

LeetCode ↗66% acc.

100

MediumPaint House

ArrayDynamic Programming

LeetCode ↗64% acc.