National Olympiad In Informatics 2026

Learning Resources

Everything you need to prepare and excel.

Past Problems & Solutions

2025

IOI 2025 Materials

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2024

IOI 2024 Materials

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2023

IOI 2023 Materials

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2022

IOI 2022 Materials

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2021

IOI 2021 Materials

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2020

IOI 2020 Materials

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Books

Competitive Programmer's Handbook

Antti Laaksonen

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Introduction to Algorithms 3rd Edition

Thomas H. Cormen

Original Source

Platforms & Others

IOI Syllabus

ISC

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Hackerrank

www.hackerrank.com

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Codeforces

www.codeforces.com

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C++ Videos

Codearchery

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