DSA Solutions - Page 5

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

2592.Maximize Greatness of an Array

2598.Smallest Missing Non-negative Integer After Operations

2599.Make the Prefix Sum Non-negative

2601.Prime Subtraction Operation

2611.Mice and Cheese

2616.Minimize the Maximum Difference of Pairs

2645.Minimum Additions to Make Valid String

2673.Make Costs of Paths Equal in a Binary Tree

2680.Maximum OR

2708.Maximum Strength of a Group

2712.Minimum Cost to Make All Characters Equal

2734.Lexicographically Smallest String After Substring Operation

2745.Construct the Longest New String

2789.Largest Element in an Array after Merge Operations

2800.Shortest String That Contains Three Strings

2811.Check if it is Possible to Split Array

2829.Determine the Minimum Sum of a k-avoiding Array

2834.Find the Minimum Possible Sum of a Beautiful Array

2844.Minimum Operations to Make a Special Number

2847.Smallest Number With Given Digit Product

2856.Minimum Array Length After Pair Removals

2870.Minimum Number of Operations to Make Array Empty

2871.Split Array Into Maximum Number of Subarrays

2892.Minimizing Array After Replacing Pairs With Their Product

2895.Minimum Processing Time

2910.Minimum Number of Groups to Create a Valid Assignment

2918.Minimum Equal Sum of Two Arrays After Replacing Zeros

2938.Separate Black and White Balls

2939.Maximum Xor Product

2952.Minimum Number of Coins to be Added

2957.Remove Adjacent Almost-Equal Characters

2966.Divide Array Into Arrays With Max Difference

2967.Minimum Cost to Make Array Equalindromic

2971.Find Polygon With the Largest Perimeter

3002.Maximum Size of a Set After Removals

3012.Minimize Length of Array Using Operations

3016.Minimum Number of Pushes to Type Word II

3035.Maximum Palindromes After Operations

3075.Maximize Happiness of Selected Children

3081.Replace Question Marks in String to Minimize Its Value

3085.Minimum Deletions to Make String K-Special

3091.Apply Operations to Make Sum of Array Greater Than or Equal to k

3106.Lexicographically Smallest String After Operations With Constraint

3107.Minimum Operations to Make Median of Array Equal to K

3111.Minimum Rectangles to Cover Points

3119.Maximum Number of Potholes That Can Be Fixed

3125.Maximum Number That Makes Result of Bitwise AND Zero

3170.Lexicographically Minimum String After Removing Stars

3189.Minimum Moves to Get a Peaceful Board

3192.Minimum Operations to Make Binary Array Elements Equal to One II

How to use these solutions