Training

Prepare for Olympiads with theory and practical exercises. Rely on the recommended resources for comprehensive preparation.

Resources

Beginner

W3schools C++ Tutorial.
EOI C++ Course (Arabic).
Introduction to Algorithms, Published by the MIT Press.
French-IOI Training Platform (French).

Intermediate

Competitive Programmer's Handbook, by Antti Laaksonen.
Programming for Programming Contests, by Atsushi Sunaga.
USACO Guide
Competitive Programming 4 (Book 1), By Steven Halim.

Training platforms

Codeforces, Famous Platform for Competitive Programming, Weekly Contests, Large Problemset.
oj.uz & DMOJ, Past Problems of IOI, CEOI, EGOI and other Olympiads.
CSES, Problemset that Covers Most IOI Topics.
Mendo.mk, Past JBOI tasks.
IOI, International Olympiad in Informatics website.