🧩 Algorithm Topic Index

This page collects links to detailed notes on all the major problem types encountered in contests, especially AtCoder. Each link leads to a page covering the topic's theory, patterns, solution techniques, and curated practice problems.

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📝 Structure of Each Topic Page

Each topic note contains:

• ✅ Overview + core idea
• 📘 Code template (linked to template page)
• 🚀 Recommended practice problems
• 🔁 Solved examples from ABC contests
• 🧠 Strategy notes & pitfalls

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🔡 String Processing

• 🔁 Longest Palindromic Substring(LPS)
• 📍 TODO - Prefix Function (KMP)
• 🧩 TODO - Rolling Hash

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🧮 Number Theory

• 🧠 TODO - Prefix XOR and Subarray XOR
• ⚙️ TODO - Modular Arithmetic & Inverse
• 🔢 TODO - GCD / LCM Tricks

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🌲 Tree / Graph Types

• 🎯 0-1 BFS
• 📌 Bipartite Graph
• 🪜 TODO - Tree
• 🔗 TODO - LCA & Binary Lifting
• 🧠 TODO - Odd Cycle Detection

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📊 Dynamic Programming Patterns

• 🎯 TODO - Digit DP
• 🎒 TODO - Knapsack Patterns
• 📈 TODO - LIS / LDS Patterns
• 🧠 TODO - Bit DP

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🧰 Simulation / Construction

• 🧪 TODO - Greedy with Position Tracking
• ⚔️ TODO - Two Pointer Matching
• 🔧 TODO - Grid Movement / Directional Simulation

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🧪 Game Theory & Parity

• 🎲 TODO - Grundy Numbers / Nim
• ⚫ TODO - Even/Odd Graph Cycles

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