🧠 LeetCode Practice by CarGDev

This repo tracks my journey solving LeetCode problems — not just code, but my thought process, reflections, and patterns I'm mastering.

✅ Progress

• Total Problems Solved: 75+
• Notes Written: 1+ (expanding soon)
• Categories Covered: Arrays, Hash Maps, Dynamic Programming, Two Pointers, Binary Search, etc.

🗂 Directory Structure

• src/exercises/: Auto-downloaded solutions via Cursor

🧩 Problem Index

#	LeetCode #	Title	Difficulty	Technology
1	001	Two Sum	Easy	Python
2	002	Add Two Numbers	Medium	Python
3	003	Longest Substring Without Repeating Characters	Medium	Python
4	004	Median of Two Sorted Arrays	Hard	Python
5	005	Longest Palindromic Substring	Medium	Python
6	009	Palindrome Number	Easy	Python
7	011	Container With Most Water	Medium	Python
8	013	Roman to Integer	Easy	Python
9	014	Longest Common Prefix	Easy	Python
10	015	3Sum	Medium	Python
11	020	Valid Parentheses	Easy	Python
12	022	Generate Parentheses	Medium	Python
13	026	Remove Duplicates from Sorted Array	Easy	Python
14	027	Remove Element	Easy	Python
15	028	Find the Index of the First Occurrence in a String	Easy	Python
16	035	Search Insert Position	Easy	Python
17	036	Valid Sudoku	Medium	Python
18	042	Trapping Rain Water	Hard	Python
19	049	Group Anagrams	Medium	JavaScript
20	050	Pow(x, n)	Medium	Python
21	055	Jump Game	Medium	Python
22	058	Length of Last Word	Easy	Python
23	066	Plus One	Easy	Python
24	069	Sqrt(x)	Easy	Python
25	070	Climbing Stairs	Easy	JavaScript
26	074	Search a 2D Matrix	Medium	Python
27	080	Remove Duplicates from Sorted Array II	Medium	Python
28	088	Merge Sorted Array	Easy	Python
29	089	Gray Code	Medium	Python
30	090	Subsets II	Medium	Python
31	091	Decode Ways	Medium	Python
32	121	Best Time to Buy and Sell Stock	Easy	Python
33	122	Best Time to Buy and Sell Stock II	Medium	Python
34	125	Valid Palindrome	Easy	Python
35	128	Longest Consecutive Sequence	Medium	Python
36	135	Candy	Hard	Python
37	141	Linked List Cycle	Easy	Python
38	149	Max Points on a Line	Hard	Python
39	151	Reverse Words in a String	Medium	Python
40	153	Find Minimum in Rotated Sorted Array	Medium	Python
41	155	Min Stack	Medium	Python
42	167	Two Sum II - Input Array Is Sorted	Medium	Python
43	169	Majority Element	Easy	Python
44	172	Factorial Trailing Zeroes	Medium	Python
45	189	Rotate Array	Medium	Python
46	202	Happy Number	Easy	Python
47	205	Isomorphic Strings	Easy	Python
48	206	Reverse Linked List	Easy	Python
49	217	Contains Duplicate	Easy	Python
50	219	Contains Duplicate II	Easy	Python
51	228	Summary Ranges	Easy	Python
52	238	Product of Array Except Self	Medium	Python
53	242	Valid Anagram	Easy	Python
54	243	Shortest Word Distance	Easy	Python
55	244	Shortest Word Distance II	Medium	Python
56	245	Shortest Word Distance III	Medium	Python
57	246	Strobogrammatic Number	Easy	Python
58	248	Strobogrammatic Number III	Hard	Python
59	271	Encode and Decode Strings	Medium	JavaScript
60	290	Word Pattern	Easy	Python
61	347	Top K Frequent Elements	Medium	JavaScript
62	383	Ransom Note	Easy	Python
63	392	Is Subsequence	Easy	Python
64	595	Big Countries	Easy	SQL
65	704	Binary Search	Easy	Python
66	760	Find Anagram Mappings	Easy	Python
67	875	Koko Eating Bananas	Medium	Python
68	1048	Longest String Chain	Medium	JavaScript
69	1200	Minimum Absolute Difference	Easy	Python
70	1302	Deepest Leaves Sum	Medium	Python
71	2016	Maximum Difference Between Increasing Elements	Easy	Python
72	2053	Kth Distinct String in an Array	Easy	Python
73	2294	Partition Array Such That Maximum Difference Is K	Medium	Python
74	3442	Maximum Difference Between Even and Odd Frequency I	Easy	Python
75	3582	Generate Tag for Video Caption	Easy	Python
76	3583	Count Special Triplets	Easy	Python

🛠️ Tools & Scripts

• create_missing_notes.sh: Automatically creates missing note files for solved problems
• update_difficulties.sh: Manage problem difficulties dynamically without hardcoding

Script Usage Examples:

# Create missing notes for new problems
./create_missing_notes.sh

# Add difficulty mapping for a problem
./update_difficulties.sh -a 1 Easy
./update_difficulties.sh -a 4 Hard

# List all difficulty mappings
./update_difficulties.sh -l

# Update all note files with correct difficulties
./update_difficulties.sh -u

# Remove difficulty mapping
./update_difficulties.sh -r 1

📚 Resources

• LeetCode Problem Set
• My LeetCode Profile

---

This repository is a living document of my algorithmic learning journey. Each note captures my thought process, mistakes, and insights.