DSA Solutions - Page 30

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

2812.Find the Safest Path in a Grid

2813.Maximum Elegance of a K-Length Subsequence

2814.Minimum Time Takes to Reach Destination Without Drowning

2815.Max Pair Sum in an Array

2817.Minimum Absolute Difference Between Elements With Constraint

2818.Apply Operations to Maximize Score

2824.Count Pairs Whose Sum is Less than Target

2826.Sorting Three Groups

2828.Check if a String Is an Acronym of Words

2830.Maximize the Profit as the Salesman

2831.Find the Longest Equal Subarray

2832.Maximal Range That Each Element Is Maximum in It

2835.Minimum Operations to Form Subsequence With Target Sum

2836.Maximize Value of Function in a Ball Passing Game

2838.Maximum Coins Heroes Can Collect

2841.Maximum Sum of Almost Unique Subarray

2845.Count of Interesting Subarrays

2846.Minimum Edge Weight Equilibrium Queries in a Tree

2848.Points That Intersect With Cars

2850.Minimum Moves to Spread Stones Over Grid

2852.Sum of Remoteness of All Cells

2855.Minimum Right Shifts to Sort the Array

2856.Minimum Array Length After Pair Removals

2857.Count Pairs of Points With Distance k

2859.Sum of Values at Indices With K Set Bits

2860.Happy Students

2861.Maximum Number of Alloys

2862.Maximum Element-Sum of a Complete Subset of Indices

2863.Maximum Length of Semi-Decreasing Subarrays

2865.Beautiful Towers I

2866.Beautiful Towers II

2869.Minimum Operations to Collect Elements

2870.Minimum Number of Operations to Make Array Empty

2871.Split Array Into Maximum Number of Subarrays

2873.Maximum Value of an Ordered Triplet I

2874.Maximum Value of an Ordered Triplet II

2875.Minimum Size Subarray in Infinite Array

2892.Minimizing Array After Replacing Pairs With Their Product

2895.Minimum Processing Time

2897.Apply Operations on Array to Maximize Sum of Squares

2898.Maximum Linear Stock Score

2899.Last Visited Integers

2900.Longest Unequal Adjacent Groups Subsequence I

2901.Longest Unequal Adjacent Groups Subsequence II

2902.Count of Sub-Multisets With Bounded Sum

2903.Find Indices With Index and Value Difference I

2905.Find Indices With Index and Value Difference II

2906.Construct Product Matrix

2907.Maximum Profitable Triplets With Increasing Prices I

2908.Minimum Sum of Mountain Triplets I

How to use these solutions