Week 1

Patterns: Arrays & Hashing
Total Problems: 20
Completed: 20 (100%)

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Progress by Difficulty

Difficulty	Total	Completed	Remaining	Percentage
🟢 Easy	8	8	0	100%
🟡 Medium	10	10	0	100%
🔴 Hard	2	2	0	100%

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Problems

#	Problem	Pattern	D	Status	Conf
1	Two Sum	Arrays & Hashing	E	✅	HGH
2	Longest Common Prefix	Arrays & Hashing	E	✅	HGH
3	Length of Last Word	Arrays & Hashing	E	✅	HGH
4	Best Time to Buy and Sell Stock	Arrays & Hashing	E	✅	HGH
5	Contains Duplicate	Arrays & Hashing	E	✅	HGH
6	Valid Anagram	Arrays & Hashing	E	✅	HGH
7	Is Subsequence	Arrays & Hashing	E	✅	HGH
8	Replace Elements with Greatest Element on Right Side	Arrays & Hashing	E	✅	HGH
9	Valid Sudoku	Arrays & Hashing	M	✅	HGH
10	Group Anagrams	Arrays & Hashing	M	✅	HGH
11	Sort Colors	Arrays & Hashing	M	✅	MED
12	Longest Consecutive Sequence	Arrays & Hashing	M	✅	MED
13	Product of Array Except Self	Arrays & Hashing	M	✅	HGH
14	Encode and Decode Strings	Arrays & Hashing	M	✅	HGH
15	Top K Frequent Elements	Arrays & Hashing	M	✅	MED
16	Find All Anagrams in a String	Arrays & Hashing	M	✅	MED
17	Subarray Sum Equals K	Arrays & Hashing	M	✅	MED
18	String Encode and Decode	Arrays & Hashing	M	✅	HGH
19	Longest Substring Without Repeating Characters	Arrays & Hashing	H	✅	MED
20	First Missing Positive	Arrays & Hashing	H	✅	MED

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Last Updated: 2026-02-13 19:40:00
Auto-generated from CSV by update_progress.py