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Advent of Code

An annual calendar of programming puzzles, with past years still open to solve

Toolora score96Free

Free; optional donations a…

Project Euler

A series of computational math problems you solve by writing a program

Toolora score94Free

Free to register and solve

SpecAdvent of CodeProject Euler
CategoryEducation & LearningEducation & Learning
PricingFree; optional donations and merchFree to register and solve
Toolora score96/10094/100
Best forpuzzles, programming, calendar, practicemath, programming, puzzles, practice
Top features
  • ·Daily puzzles
  • ·Past year archives
  • ·Private leaderboards
  • ·Math problems
  • ·Programming challenges
  • ·Progress tracking