🧩 LeetCode Solutions

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📖 About

An organized, growing collection of my LeetCode solutions in Python. Each problem is committed under its difficulty — easy/, medium/, or hard/ — using a consistent, link-friendly naming scheme.

The focus is on clean, readable, efficient solutions and on building durable problem-solving patterns across data structures and algorithms.

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📊 LeetCode Stats

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🎯 Progress

Difficulty	Solved
🟢 Easy	19
🟡 Medium	0
🔴 Hard	0
Total	19

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🧠 Solutions Index

🟢 Easy (19)

#	Problem	Solution
1	Two Sum	Python
9	Palindrome Number	Python
13	Roman To Integer	Python
14	Longest Common Prefix	Python
20	Valid Parentheses	Python
21	Merge Two Sorted Lists	Python
26	Remove Duplicates From Sorted Array	Python
27	Remove Element	Python
28

🟡 Medium (0)

No solutions yet.

🔴 Hard (0)

No solutions yet.

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🗂️ Repository Structure

leetcode-solutions/
├── easy/
│   ├── 0001_two_sum.py
│   ├── 0009_palindrome_number.py
│   ├── 0013_roman_to_integer.py
│   ├── 0014_longest_common_prefix.py
│   ├── 0020_valid_parentheses.py
│   ├── 0021_merge_two_sorted_lists.py
│   ├── 0026_remove_duplicates_from_sorted_array.py
│   ├── 0027_remove_element.py
│   ├── 0028_find_the_index_of_the_first_occurrence_in_a_string.py
│   ├── 0035_search_insert_position_v2.py
│   ├── 0035_search_insert_position.py
│   ├── 0058_length_of_last_word.py
│   ├── 0066_plus_one_v2.py
│   ├── 0066_plus_one.py
│   ├── 0067_add_binary.py
│   ├── 0069_sqrt_x_v2.py
│   ├── 0069_sqrt_x.py
│   ├── 0070_climbing_stairs.py
│   └── 0083_remove_duplicates_from_sorted_list.py
├── medium/
├── hard/
└── README.md

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🏷️ Naming Convention

Solutions follow a strict, link-friendly pattern so the automation can build correct LeetCode links:

<number>_<leetcode-slug-with-underscores>.py

Filename	Problem	Generated link
easy/0001_two_sum.py	#1 Two Sum	leetcode.com/problems/two-sum/
medium/0146_lru_cache.py	#146 LRU Cache	leetcode.com/problems/lru-cache/

Rules:

• Pad the number to 4 digits (0001, 0042, 1342).
• Use the exact LeetCode slug, with its hyphens written as underscores (two-sum → two_sum). The script converts them back to build the URL.
• One file per problem.

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🧮 Topics Covered

Arrays · Strings · Hash Maps · Two Pointers · Sliding Window · Linked Lists · Stacks · Queues · Trees · Binary Search · Recursion · Backtracking · Dynamic Programming · Graphs · Greedy · Heaps

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⚙️ Automation

The progress table, solutions index, and directory tree are generated automatically. A GitHub Action runs scripts/update_readme.py on every push, keeping each section in sync with the solutions committed to this repository.

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🚀 Goals

• Build deep fluency in data structures and algorithms
• Write clean, efficient, idiomatic Python
• Develop reliable pattern recognition for coding interviews
• Maintain consistency — solve, document, repeat