🔒 DSA Vault

From Brute Force to Optimal — Visually

LeetCode solutions with step-by-step flow diagrams, Python & Java code, company tags, and complexity analysis. Every problem explained from brute force to optimal.

Browse All Problems

Topics

Array

1 problem

Hash Table

1 problem

String

1 problem

Stack

1 problem

Top Companies

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Amazon

2 problems

Google

2 problems

Microsoft

2 problems

Apple

1 problem

All Problems

2 problems

Difficulty:

#	Title	Topics	Difficulty
1	Two Sum	ArrayHash Table	Easy
20	Valid Parentheses	StringStack	Easy