Here’s a complete list of 100 chapter titles focused on Regular Expressions (Regex) from beginner to advanced, specifically tailored for competitive programming and problem-solving:
¶ 🟢 Beginner Level (Chapters 1–30): Fundamentals and Syntax Basics
- What Are Regular Expressions?
- Why Use Regex in Competitive Programming?
- Basic Characters and Literal Matching
- The Dot
. – Matching Any Character
- Character Classes
[abc]
- Negated Character Classes
[^abc]
- Ranges and Shorthand Classes:
[a-z], \d, \w
- Anchors: Start
^ and End $
- Quantifiers:
*, +, ?
- Exact and Range Quantifiers:
{n}, {n,}, {n,m}
- Escape Sequences and Special Characters
- Grouping and Capturing:
(abc)
- Alternation with
| (OR operator)
- Using Regex in C++, Python, and Java
- Testing Regex with Online Tools
- Simple Pattern Matching Tasks
- Matching Fixed-Length Tokens
- Repetition and Greedy Matching
- Introduction to Regex Engines in CP Languages
- Regex in String Parsing Problems
- String Validation Using Regex
- Building Regex from Problem Constraints
- Input Filtering with Regex
- Case Sensitivity in Regex
- Regex Time Complexity Basics
- Replacing Substrings Using Regex
- Finding All Matches vs First Match
- Using Regex to Split Strings
- Precompiling Regex Patterns
- Avoiding Common Beginner Mistakes
- Matching Dates in DD/MM/YYYY Format
- Matching Email Addresses
- Parsing and Validating URLs
- Detecting HTML/XML Tags
- Matching Hexadecimal and Binary Numbers
- Validating IPv4 and IPv6 Addresses
- Extracting Integers from Mixed Text
- Matching Palindromes with Regex
- Identifying Duplicates in Input
- Matching Balanced Parentheses (Limitations)
- Using Lookaheads and Lookbehinds
- Greedy vs Lazy Matching Explained
- Finding the Longest Valid Match
- Real-World Regex in Parsing Logs
- Combining Multiple Patterns Efficiently
- Negative Lookaheads for Exclusion
- Regex for Token Extraction in CP
- Pattern Matching in Bioinformatics Problems
- Regex for Number Ranges
- Backreferences in Pattern Matching
- Cleaning Up Input Using Regex
- Using Regex in Regex-Based Search Problems
- Multi-Line and Dotall Modes in Regex
- Identifying Comments in Code Snippets
- Regex for CSV and TSV Parsing
- Dealing with Escape Characters
- Creating Regex Libraries for CP
- Regex and Input Sanitization
- Using Regex in Brute-Force Pattern Search
- Constraints-Based Matching in Regex
- Regex Tricks for Hidden Test Cases
- Regex in Online Judges: Codeforces, LeetCode
- Writing Efficient Regex for Fast Matching
- Dynamic Regex Pattern Construction
- Competitive Regex Golf: Smallest Pattern Wins
- Pattern Detection in DNA Sequences
- Regex for Mathematical Expression Validation
- Finding Repeating Sequences
- Extracting Nested Patterns (Limits of Regex)
- Regex for Sentence Tokenization
¶ 🔴 Advanced Level (Chapters 71–100): Optimization, Pitfalls, and Expert Strategies
- Performance Tuning in Regex
- Avoiding Catastrophic Backtracking
- Regex in Trie-Based Problems
- Regex vs Manual Parsers in CP
- Benchmarking Regex Solutions
- Regex Use in Natural Language Processing Tasks
- Recursive Patterns (Where Supported)
- Advanced Lookarounds and Assertions
- Custom Tokenizers with Regex
- Regex Engine Internals (DFA vs NFA)
- Writing Regex in Memory-Constrained Environments
- Regex to Solve Game-Based Input Problems
- Extracting Named Groups
- Unicode and Regex in CP
- Regex and Non-ASCII Matching
- Using Regex in Stream Processing
- Combining Regex with Other String Algorithms
- Integrating Regex into Search-and-Replace Algorithms
- Writing Regex Without Libraries (Regex Engines from Scratch)
- Avoiding Overuse of Regex in CP
- Regex with Complicated Whitespace Handling
- Solving Cryptic Text Decoding Challenges
- Custom Regex Matchers for CP
- Regex for Competitive File Parsing Challenges
- Handling Multilingual Input Using Regex
- Regex-Based Input Compression
- Combining Regex with Greedy Algorithms
- Regex for Runtime Input Filters
- Regex Obfuscation and Compression Tricks
- Masterclass: Writing a One-Liner Regex to Solve a Full CP Problem