DSA Solutions - Page 10

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

2153.The Number of Passengers in Each Bus II

2156.Find Substring With Given Hash Value

2157.Groups of Strings

2158.Amount of New Area Painted Each Day

2163.Minimum Difference in Sums After Removal of Elements

2167.Minimum Time to Remove All Cars Containing Illegal Goods

2172.Maximum AND Sum of Array

2173.Longest Winning Streak

2179.Count Good Triplets in an Array

2183.Count Array Pairs Divisible by K

2188.Minimum Time to Finish the Race

2193.Minimum Number of Moves to Make Palindrome

2197.Replace Non-Coprime Numbers in Array

2199.Finding the Topic of Each Post

2203.Minimum Weighted Subgraph With the Required Paths

2204.Distance to a Cycle in Undirected Graph

2209.Minimum White Tiles After Covering With Carpets

2213.Longest Substring of One Repeating Character

2218.Maximum Value of K Coins From Piles

2223.Sum of Scores of Built Strings

2227.Encrypt and Decrypt Strings

2234.Maximum Total Beauty of the Gardens

2242.Maximum Score of a Node Sequence

2246.Longest Path With Different Adjacent Characters

2247.Maximum Cost of Trip With K Highways

2251.Number of Flowers in Full Bloom

2252.Dynamic Pivoting of a Table

2253.Dynamic Unpivoting of a Table

2258.Escape the Spreading Fire

2262.Total Appeal of A String

2263.Make Array Non-decreasing or Non-increasing

2267. Check if There Is a Valid Parentheses String Path

2272.Substring With Largest Variance

2276.Count Integers in Intervals

2281.Sum of Total Strength of Wizards

2286.Booking Concert Tickets in Groups

2290.Minimum Obstacle Removal to Reach Corner

2296.Design a Text Editor

2301.Match Substring After Replacement

2302.Count Subarrays With Score Less Than K

2306.Naming a Company

2307.Check for Contradictions in Equations

2312.Selling Pieces of Wood

2313.Minimum Flips in Binary Tree to Get Result

2318.Number of Distinct Roll Sequences

2321.Maximum Score Of Spliced Array

2322.Minimum Score After Removals on a Tree

2328.Number of Increasing Paths in a Grid

2334.Subarray With Elements Greater Than Varying Threshold

2338.Count the Number of Ideal Arrays

How to use these solutions