Skip to content

6,362 Problems. One Archive.
A challenge for every curious mind.

Explore decades of Topcoder problems. Read the statements, study the examples, and put your skills to the test.

Explore the problems

TextBoard

ArchivePractice problem

Algorithm problem

RRSchedule

ArchivePractice problem

Algorithm problem

RoadReform

ArchivePractice problem

Algorithm problem

SubgridsCounter

ArchivePractice problem

Algorithm problem

CharSwaps

ArchivePractice problem

Algorithm problem

ConductorWalk

ArchivePractice problem

Algorithm problem

WaterEqualizer

ArchivePractice problem

Algorithm problem

EvilRobot

ArchivePractice problem

Algorithm problem

OptimalPlay

ArchivePractice problem

Algorithm problem

WhackAMole

ArchivePractice problem

Algorithm problem

5571–5580 of 6,362 problems

These pages preserve content from retired Topcoder services. Problem pages include public learning material; member submissions and performance data are not published.