Strings & Arrays

Understanding strings and arrays is essential in programming contests and problem solving.
This page gathers tutorials, guided exercises, and problem sets to help you master them.

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📚 Learning Resources

• C++ Strings (Programiz)
• C++ Arrays (Programiz)
• C++ Vectors (Programiz)
• France-IOI — Algorithmic Training

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📝 Problem Sets

These problem sets are from Assiut University Training (Codeforces Group).

• Arrays — Sheet #3
• Strings — Sheet #4

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💡 Tips

• Prefer std::string, std::vector, over arrays unless required.
• Always check bounds when working with arrays or strings.
• Debug with small test cases before tackling larger inputs.
• Use getline() when you need to read full lines with spaces instead of plain cin.
• Learn key std::string methods: .size(), .substr(), .find(), .push_back().
• Familiarize yourself with useful STL algorithms: sort, reverse, min_element, max_element, accumulate.
• Remember: arrays have fixed size, but vector grows dynamically—use accordingly.
• Practice different loop styles: range-based loops and indexed loops each have their use cases.
• For performance, pass large strings or vectors by const & reference, not by value.

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