This repository contains implementations of various coding patterns with a focus on security and attack-defense strategies. The project demonstrates secure implementations of algorithms and data structures while showing how they can be attacked and defended against.

• two-pointer-project: Main implementation of two-pointer algorithms with security considerations
• two-pointer-5-types: Documentation and specialized implementations of 5 types of two-pointer patterns
• fast-n-slow-pointer: Fast and slow pointer patterns (currently empty)

1. Opposite-Ends (Converging)
2. Same-Direction (Fast/Slow; "Tortoise–Hare")
3. Window Bounds (Left/Right)
4. Partitioning (Read/Write or Hoare/Lomuto-style)
5. Bidirectional Merge / Set Ops

Each implementation includes security considerations to prevent:

• Out-of-bounds access
• Integer overflow/underflow
• Timing attacks
• Resource exhaustion

The two-pointer-5-types/out-of-bounds-protection directory contains specialized implementations focused on preventing out-of-bounds access and memory corruption vulnerabilities.

Comprehensive test suites including:

• Unit tests
• Property-based tests
• Attack-defense tests