HackerBrewery

Skip to content

hackerbreweryGOOD CODE. GREAT COMPANY.

WORKSPACE

The lobby Problems Your problems Your progress Leaderboard The bookshelf Pricing Your account

THE COMMON ROOM

Pick a problem.
Try an approach.

Hints are there when you need them.

Workspace/Your account

Loading your account…

Create a room

01

Room settings

Pick some problems and invite your friends.

Room name

Use this name, generate another, or write your own.

Session type

Private link · up to 6 people · expires after 24 hours

02

Pick your problems

Choose up to 6 problems for your session.

22 problems

A perfect pairArrays · Hash mapsEasyKeep it togetherStrings · StacksEasyTwo queues, one counterArrays · Two pointersEasySomething differentStrings · Sliding windowMediumIslands in the brewGraphs · Depth-first searchMediumThe long way homeGraphs · Shortest pathsHardThe first solo ticketArrays · Hash mapsEasyRestock before openingArrays · Hash mapsEasyA ledger worth checkingArrays · Hash maps · Prefix sumsMediumFlights with a precise mixArrays · Hash maps · Sliding windowHardMatch the roast-day cratesArrays · Two pointersEasyFind the busiest tray runArrays · Sliding windowEasyMake room for a quiet shiftArrays · Two pointers · Sliding windowMediumCount the steady pour runsArrays · Sliding window · QueuesHardReplay the ticket boardArrays · StacksEasyServe the pickup lineArrays · QueuesEasyFind the next cooler batchArrays · StacksMediumTotal the bottleneck windowsArrays · Stacks · MathHardCount the end-shelf stockTrees · ArraysEasyLoad the trays by tierTrees · Breadth-first searchEasyFind branches within budgetTrees · Depth-first searchMediumPlace the delivery hubTrees · Dynamic programmingHard

Pick at least one problemStudy together · at your own pace

Find your next challenge

A perfect pairArrays · Hash mapsEasy Keep it togetherStrings · StacksEasy Two queues, one counterArrays · Two pointersEasy Something differentStrings · Sliding windowMedium Islands in the brewGraphs · Depth-first searchMedium The long way homeGraphs · Shortest pathsHard

Browse all problems

Welcome to the brewery

Welcome to HackerBrewery.

Read the guide to coding rooms

Create a private room and invite up to five friends. Choose a relaxed study session or a timed sprint, then talk through the ideas together. Rooms close after 24 hours.

Share your code when you’re ready, or keep working privately. Sign in to save your practice across devices. Sample checks help you explore an approach; they don’t award competitive rankings.

Make yourself at home

Choose the name other participants will see.

Display name

Keep your drafts and progress on every device.

Sign in to save your work