Arrays & Hashing Foundations · Product Companies SDE-1 Sheet

Product Companies SDE-1 Sheet

Arrays & Hashing Foundations

10 problems

problem

Topic Progress0 / 10 solved

Problem List

Work through the problems in sequence to build topic mastery.

Problem	Difficulty	Status	Optional	Action
Two Sum	Medium	Unsolved	Required	Open Problem
Contains Duplicate	Medium	Unsolved	Required	Open Problem
Valid Anagram	Medium	Unsolved	Required	Open Problem
Group Anagrams	Medium	Unsolved	Required	Open Problem
Product Of Array Except Self	Medium	Unsolved	Required	Open Problem
Top K Frequent Elements	Medium	Unsolved	Required	Open Problem
Majority Element	Medium	Unsolved	Required	Open Problem
Sort Colors	Medium	Unsolved	Required	Open Problem
Maximum Subarray	Medium	Unsolved	Required	Open Problem
Best Time To Buy And Sell Stock	Medium	Unsolved	Required	Open Problem

Topic Snapshot

A compact summary of what this sheet section covers and how far you have progressed.

Arrays & Hashing Foundations

Start with frequency maps, prefix-style thinking, grouping, and the array patterns that appear in almost every SDE-1 loop.

sde-1

product-companies

Completion

Problems Remaining

Optional Problems

Complete the required items first, then use optional problems for extra depth.

Loading Preptin