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Video Solutions

Watch step-by-step video walkthroughs for DSA problems. Learn from expert explanations.

39
With Videos
11
Easy
21
Medium
7
Hard

Filter by Difficulty

Browse video solutions by difficulty level

2601. Prime Subtraction Operation

MediumArrayBinary SearchGreedy
Watch Solutions55.9% acceptance

2603. Collect Coins in a Tree

HardArrayGraphTopological Sort
Watch Solutions39.6% acceptance

2604. Minimum Time to Eat All Grains

HardArrayBinary SearchSorting
Watch Solutions40.8% acceptance

2605. Form Smallest Number From Two Digit Arrays

EasyArrayEnumerationHash Table
Watch Solutions55.1% acceptance

2609. Find the Longest Balanced Substring of a Binary String

EasyString
Watch Solutions46.6% acceptance

2610. Convert an Array Into a 2D Array With Conditions

MediumArrayHash Table
Watch Solutions86.1% acceptance

2611. Mice and Cheese

MediumArrayGreedyHeap (Priority Queue)
Watch Solutions48.6% acceptance

2612. Minimum Reverse Operations

HardArrayBreadth-First SearchOrdered Set
Watch Solutions16.9% acceptance

2615. Sum of Distances

MediumArrayHash TablePrefix Sum
Watch Solutions50.2% acceptance

2616. Minimize the Maximum Difference of Pairs

MediumArrayBinary SearchGreedy
Watch Solutions50.9% acceptance

2617. Minimum Number of Visited Cells in a Grid

HardArrayBreadth-First SearchDynamic Programming
Watch Solutions24.1% acceptance

2618. Check if Object Instance of Class

Medium
Watch Solutions27.7% acceptance

2619. Array Prototype Last

Easy
Watch Solutions74.0% acceptance

2620. Counter

Easy
Watch Solutions81.6% acceptance

2621. Sleep

Easy
Watch Solutions87.3% acceptance

2622. Cache With Time Limit

Medium
Watch Solutions75.1% acceptance

2623. Memoize

Medium
Watch Solutions63.0% acceptance

2624. Snail Traversal

Medium
Watch Solutions66.0% acceptance

2625. Flatten Deeply Nested Array

Medium
Watch Solutions63.7% acceptance

2626. Array Reduce Transformation

Easy
Watch Solutions85.1% acceptance

2627. Debounce

Medium
Watch Solutions91.3% acceptance

2628. JSON Deep Equal

Medium
Watch Solutions38.8% acceptance

2629. Function Composition

Easy
Watch Solutions86.7% acceptance

2630. Memoize II

Hard
Watch Solutions31.5% acceptance

2631. Group By

Medium
Watch Solutions81.0% acceptance

2632. Curry

Medium
Watch Solutions89.2% acceptance

2633. Convert Object to JSON String

Medium
Watch Solutions77.4% acceptance

2634. Filter Elements from Array

Easy
Watch Solutions85.1% acceptance

2635. Apply Transform Over Each Element in Array

Easy
Watch Solutions86.0% acceptance

2636. Promise Pool

Medium
Watch Solutions79.8% acceptance

2637. Promise Time Limit

Medium
Watch Solutions82.0% acceptance

2640. Find the Score of All Prefixes of an Array

MediumArrayPrefix Sum
Watch Solutions72.9% acceptance

2641. Cousins in Binary Tree II

MediumBinary TreeBreadth-First SearchDepth-First Search
Watch Solutions75.8% acceptance

2643. Row With Maximum Ones

EasyArrayMatrix
Watch Solutions74.2% acceptance

2645. Minimum Additions to Make Valid String

MediumDynamic ProgrammingGreedyStack
Watch Solutions51.0% acceptance

2646. Minimize the Total Price of the Trips

HardArrayDepth-First SearchDynamic Programming
Watch Solutions48.5% acceptance

2648. Generate Fibonacci Sequence

Easy
Watch Solutions83.6% acceptance

2649. Nested Array Generator

Medium
Watch Solutions79.3% acceptance

2650. Design Cancellable Function

Hard
Watch Solutions49.6% acceptance
Page 53 of 81

Learn DSA with Video Solutions

Video solutions provide a visual, step-by-step approach to understanding Data Structures and Algorithms problems. Watching an expert walk through the thought process, from brute force to optimal solution, helps build the intuition needed for coding interviews.

How to Use Video Solutions Effectively

  • Try the problem first: Spend at least 20-30 minutes attempting the problem before watching the video
  • Pause and think: When the video mentions a key insight, pause and try to work through it yourself
  • Code along: After understanding the approach, implement the solution on your own
  • Review text solutions: Combine video walkthroughs with detailed text explanations for deeper understanding

Video Solutions by Difficulty

Start with Easy problems to build confidence and learn fundamental patterns. Progress to Medium problems where most interview questions fall. Hard problems help you prepare for the toughest interview rounds at top tech companies.