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Video Solutions

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

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9
Easy
22
Medium
11
Hard

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Browse video solutions by difficulty level

1203. Sort Items by Groups Respecting Dependencies

HardBreadth-First SearchDepth-First SearchGraph
Watch Solutions66.0% acceptance

1204. Last Person to Fit in the Bus

MediumDatabase
Watch Solutions68.0% acceptance

1205. Monthly Transactions II

MediumDatabase
Watch Solutions41.8% acceptance

1206. Design Skiplist

HardDesignLinked List
Watch Solutions59.7% acceptance

1207. Unique Number of Occurrences

EasyArrayHash Table
Watch Solutions78.7% acceptance

1211. Queries Quality and Percentage

EasyDatabase
Watch Solutions43.6% acceptance

1212. Team Scores in Football Tournament

MediumDatabase
Watch Solutions55.6% acceptance

1213. Intersection of Three Sorted Arrays

EasyArrayBinary SearchCounting
Watch Solutions80.2% acceptance

1214. Two Sum BSTs

MediumBinary SearchBinary Search TreeBinary Tree
Watch Solutions68.2% acceptance

1215. Stepping Numbers

MediumBacktrackingBreadth-First SearchMath
Watch Solutions48.2% acceptance

1216. Valid Palindrome III

HardDynamic ProgrammingString
Watch Solutions49.2% acceptance

1217. Minimum Cost to Move Chips to The Same Position

EasyArrayGreedyMath
Watch Solutions72.8% acceptance

1218. Longest Arithmetic Subsequence of Given Difference

MediumArrayDynamic ProgrammingHash Table
Watch Solutions54.5% acceptance

1220. Count Vowels Permutation

HardDynamic Programming
Watch Solutions61.7% acceptance

1221. Split a String in Balanced Strings

EasyCountingGreedyString
Watch Solutions87.3% acceptance

1222. Queens That Can Attack the King

MediumArrayMatrixSimulation
Watch Solutions72.6% acceptance

1224. Maximum Equal Frequency

HardArrayHash Table
Watch Solutions38.2% acceptance

1225. Report Contiguous Dates

HardDatabase
Watch Solutions56.9% acceptance

1226. The Dining Philosophers

MediumConcurrency
Watch Solutions54.5% acceptance

1227. Airplane Seat Assignment Probability

MediumBrainteaserDynamic ProgrammingMath
Watch Solutions67.3% acceptance

1228. Missing Number In Arithmetic Progression

EasyArrayMath
Watch Solutions52.0% acceptance

1229. Meeting Scheduler

MediumArraySortingTwo Pointers
Watch Solutions55.3% acceptance

1230. Toss Strange Coins

MediumArrayDynamic ProgrammingMath
Watch Solutions58.1% acceptance

1231. Divide Chocolate

HardArrayBinary Search
Watch Solutions60.5% acceptance

1232. Check If It Is a Straight Line

EasyArrayGeometryMath
Watch Solutions40.1% acceptance

1233. Remove Sub-Folders from the Filesystem

MediumArrayDepth-First SearchString
Watch Solutions78.6% acceptance

1235. Maximum Profit in Job Scheduling

HardArrayBinary SearchDynamic Programming
Watch Solutions54.8% acceptance

1236. Web Crawler

MediumBreadth-First SearchDepth-First SearchInteractive
Watch Solutions68.8% acceptance

1237. Find Positive Integer Solution for a Given Equation

MediumBinary SearchInteractiveMath
Watch Solutions69.7% acceptance

1238. Circular Permutation in Binary Representation

MediumBacktrackingBit ManipulationMath
Watch Solutions72.6% acceptance

1239. Maximum Length of a Concatenated String with Unique Characters

MediumArrayBacktrackingBit Manipulation
Watch Solutions54.7% acceptance

1240. Tiling a Rectangle with the Fewest Squares

HardBacktracking
Watch Solutions55.0% acceptance

1241. Number of Comments per Post

EasyDatabase
Watch Solutions66.0% acceptance

1242. Web Crawler Multithreaded

MediumBreadth-First SearchConcurrencyDepth-First Search
Watch Solutions49.5% acceptance

1243. Array Transformation

EasyArraySimulation
Watch Solutions53.6% acceptance

1244. Design A Leaderboard

MediumDesignHash TableSorting
Watch Solutions67.9% acceptance

1245. Tree Diameter

MediumBreadth-First SearchDepth-First SearchGraph
Watch Solutions61.1% acceptance

1246. Palindrome Removal

HardArrayDynamic Programming
Watch Solutions46.4% acceptance

1247. Minimum Swaps to Make Strings Equal

MediumGreedyMathString
Watch Solutions65.3% acceptance

1248. Count Number of Nice Subarrays

MediumArrayHash TableMath
Watch Solutions75.5% acceptance

1249. Minimum Remove to Make Valid Parentheses

MediumStackString
Watch Solutions71.3% acceptance

1250. Check If It Is a Good Array

HardArrayMathNumber Theory
Watch Solutions65.6% acceptance
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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.