DSA Solutions - Page 11

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

2360.Longest Cycle in a Graph

2361.Minimum Costs Using the Train Line

2362.Generate the Invoice

2366.Minimum Replacements to Sort the Array

2371.Minimize Maximum Value in a Grid

2376.Count Special Integers

2382.Maximum Segment Sum After Removals

2386.Find the K-Sum of an Array

2392.Build a Matrix With Conditions

2398.Maximum Number of Robots Within Budget

2402.Meeting Rooms III

2403.Minimum Time to Kill All Monsters

2407.Longest Increasing Subsequence II

2412.Minimum Money Required Before Transactions

2416.Sum of Prefix Scores of Strings

2421.Number of Good Paths

2426.Number of Pairs Satisfying Inequality

2430.Maximum Deletions on a String

2435.Paths in Matrix Whose Sum Is Divisible by K

2440.Create Components With Same Value

2444.Count Subarrays With Fixed Bounds

2448.Minimum Cost to Make Array Equal

2449.Minimum Number of Operations to Make Arrays Similar

2454.Next Greater Element IV

2458.Height of Binary Tree After Subtree Removal Queries

2459.Sort Array by Moving Items to Empty Space

2463.Minimum Total Distance Traveled

2468.Split Message Based on Limit

2472.Maximum Number of Non-overlapping Palindrome Substrings

2474.Customers With Strictly Increasing Purchases

2478.Number of Beautiful Partitions

2484.Count Palindromic Subsequences

2488.Count Subarrays With Median K

2493.Divide Nodes Into the Maximum Number of Groups

2494.Merge Overlapping Events in the Same Hall

2499.Minimum Total Cost to Make Arrays Unequal

2503.Maximum Number of Points From Grid Queries

2508.Add Edges to Make Degrees of All Nodes Even

2509.Cycle Length Queries in a Tree

2514.Count Anagrams

2518.Number of Great Partitions

2519.Count the Number of K-Big Indices

2524.Maximum Frequency Score of a Subarray

2528.Maximize the Minimum Powered City

2532.Time to Cross a Bridge

2534.Time Taken to Cross the Door

2538.Difference Between Maximum and Minimum Price Sum

2543.Check if Point Is Reachable

2547.Minimum Cost to Split an Array

2551.Put Marbles in Bags

How to use these solutions