DSA Solutions - Page 25

Each solution breaks the problem into approaches, usually from brute force to the best one, and explains why each works. Code comes in Python, Java, C++ and other languages. Knowing why an approach works matters more in an interview than remembering the code.

Try the problem first. Give it at least 20 minutes before you open the solution.
Read every approach. The brute force shows you the problem; the faster ones show the pattern.
Check the complexity. Note the time and space of each approach and what makes the difference.
Write it yourself. Close the solution and code it from memory in the editor.
Come back in a week. Solving it again later is what makes the pattern stick.

All problems Topics Company questions Sheets

Solutions, explained

2358.Maximum Number of Groups Entering a Competition

2361.Minimum Costs Using the Train Line

2363.Merge Similar Items

2364.Count Number of Bad Pairs

2365.Task Scheduler II

2366.Minimum Replacements to Sort the Array

2367.Number of Arithmetic Triplets

2368.Reachable Nodes With Restrictions

2369.Check if There is a Valid Partition For The Array

2371.Minimize Maximum Value in a Grid

2373.Largest Local Values in a Matrix

2381.Shifting Letters II

2382.Maximum Segment Sum After Removals

2383.Minimum Hours of Training to Win a Competition

2386.Find the K-Sum of an Array

2387.Median of a Row Wise Sorted Matrix

2389.Longest Subsequence With Limited Sum

2391.Minimum Amount of Time to Collect Garbage

2392.Build a Matrix With Conditions

2393.Count Strictly Increasing Subarrays

2395.Find Subarrays With Equal Sum

2397.Maximum Rows Covered by Columns

2398.Maximum Number of Robots Within Budget

2399.Check Distances Between Same Letters

2401.Longest Nice Subarray

2402.Meeting Rooms III

2403.Minimum Time to Kill All Monsters

2404.Most Frequent Even Element

2406.Divide Intervals Into Minimum Number of Groups

2407.Longest Increasing Subsequence II

2408.Design SQL

2410.Maximum Matching of Players With Trainers

2411.Smallest Subarrays With Maximum Bitwise OR

2412.Minimum Money Required Before Transactions

2416.Sum of Prefix Scores of Strings

2418.Sort the People

2419.Longest Subarray With Maximum Bitwise AND

2420.Find All Good Indices

2421.Number of Good Paths

2422.Merge Operations to Turn Array Into a Palindrome

2425.Bitwise XOR of All Pairings

2426.Number of Pairs Satisfying Inequality

2428.Maximum Sum of an Hourglass

2431.Maximize Total Tastiness of Purchased Fruits

2432.The Employee That Worked on the Longest Task

2433.Find The Original Array of Prefix Xor

2435.Paths in Matrix Whose Sum Is Divisible by K

2436.Minimum Split Into Subarrays With GCD Greater Than One

2438.Range Product Queries of Powers

2439.Minimize Maximum of Array

How to use these solutions