FleetCode
Video Solutions
Watch step-by-step video walkthroughs for DSA problems. Learn from expert explanations.
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Easy
20
Medium
0
Hard
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3955. Valid Binary Strings With Cost Limit
MediumBacktrackingBit ManipulationEnumeration
Watch Solutions78.5% acceptance
3961. Maximize Sum of Device Ratings
MediumArrayGreedyMatrix
Watch Solutions39.4% acceptance
3968. Maximum Manhattan Distance After All Moves
MediumCountingMathString
Watch Solutions63.3% acceptance
3964. Minimum Lights to Illuminate a Road
MediumArrayPrefix Sum
Watch Solutions37.8% acceptance
3969. Valid Subarrays With Matching Sum Digits I
MediumArrayEnumerationHash Table
Watch Solutions46.8% acceptance
3974. Maximum Total Sum of K Selected Elements
MediumArrayGreedySorting
Watch Solutions49.1% acceptance
3975. Filter Occupied Intervals
MediumArraySorting
Watch Solutions46.0% acceptance
3993. Maximum Value of an Alternating Sequence
MediumGreedyMath
Watch Solutions31.5% acceptance
3997. Count Dominant Nodes in a Binary Tree
MediumBinary TreeDepth-First SearchTree
Watch Solutions72.1% acceptance
3987. Minimum Total Cost to Process All Elements
MediumArrayMathSimulation
Watch Solutions24.7% acceptance
3983. Subsequence After One Replacement
MediumStringTwo Pointers
Watch Solutions21.6% acceptance
3979. Maximum Valid Pair Sum
MediumArrayEnumeration
Watch Solutions49.2% acceptance
3994. Minimum Adjacent Swaps to Partition Array
MediumArrayGreedy
Watch Solutions57.4% acceptance
3980. Minimum Operations to Transform Binary String
MediumDynamic ProgrammingGreedyString
Watch Solutions36.4% acceptance
3984. Divisible Game
MediumArrayDynamic ProgrammingEnumeration
Watch Solutions42.3% acceptance
4015. Weighted Sum of a Tree
MediumArrayDepth-First SearchTree
Watch Solutions41.7% acceptance
4031. Find All Numbers Disappeared in an Array II
MediumArrayBinary SearchSorting
Watch Solutions52.8% acceptance
4034. Minimum Bishop Moves to Reach Target
MediumArrayMath
Watch Solutions65.4% acceptance
4039. Sum of Decoded Numbers
MediumArrayMathSimulation
Watch Solutions44.8% acceptance
4044. Count Good Cyclic Rotations
MediumArrayPrefix SumSliding Window
Watch Solutions49.0% acceptance
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.