DSA Solutions - Page 32

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

2962.Count Subarrays Where Max Element Appears at Least K Times

2964.Number of Divisible Triplet Sums

2966.Divide Array Into Arrays With Max Difference

2967.Minimum Cost to Make Array Equalindromic

2971.Find Polygon With the Largest Perimeter

2975.Maximum Square Area by Removing Fences From a Field

2976.Minimum Cost to Convert String I

2979.Most Expensive Item That Can Not Be Bought

2981.Find Longest Special Substring That Occurs Thrice I

2982.Find Longest Special Substring That Occurs Thrice II

2984.Find Peak Calling Hours for Each City

2986.Find Third Transaction

2988.Manager of the Largest Department

2989.Class Performance

2992.Number of Self-Divisible Permutations

2993.Friday Purchases I

2997.Minimum Number of Operations to Make Array XOR Equal to K

2998.Minimum Number of Operations to Make X and Y Equal

3001.Minimum Moves to Capture The Queen

3002.Maximum Size of a Set After Removals

3004.Maximum Subtree of the Same Color

3006.Find Beautiful Indices in the Given Array I

3007.Maximum Number That Sum of the Prices Is Less Than or Equal to K

3011.Find if Array Can Be Sorted

3012.Minimize Length of Array Using Operations

3015.Count the Number of Houses at a Certain Distance I

3016.Minimum Number of Pushes to Type Word II

3020.Find the Maximum Number of Elements in Subset

3021.Alice and Bob Playing Flower Game

3023.Find Pattern in Infinite Stream I

3025.Find the Number of Ways to Place People I

3026.Maximum Good Subarray Sum

3029.Minimum Time to Revert Word to Initial State I

3030.Find the Grid of Region Average

3034.Number of Subarrays That Match a Pattern I

3035.Maximum Palindromes After Operations

3039.Apply Operations to Make String Empty

3040.Maximum Number of Operations With the Same Score II

3043.Find the Length of the Longest Common Prefix

3044.Most Frequent Prime

3047.Find the Largest Area of Square Inside Two Rectangles

3048.Earliest Second to Mark Indices I

3050.Pizza Toppings Cost Analysis

3054.Binary Tree Nodes

3055.Top Percentile Fraud

3056.Snaps Analysis

3058.Friends With No Mutual Friends

3064.Guess the Number Using Bitwise Questions I

3066.Minimum Operations to Exceed Threshold Value II

3067.Count Pairs of Connectable Servers in a Weighted Tree Network

How to use these solutions