FleetCode
Video Solutions
Watch step-by-step video walkthroughs for DSA problems. Learn from expert explanations.
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44
Easy
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Hard
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1790. Check if One String Swap Can Make Strings Equal
EasyCountingHash TableString
Watch Solutions49.5% acceptance
1791. Find Center of Star Graph
EasyGraph
Watch Solutions86.6% acceptance
1795. Rearrange Products Table
EasyDatabase
Watch Solutions85.4% acceptance
1800. Maximum Ascending Subarray Sum
EasyArray
Watch Solutions66.3% acceptance
1805. Number of Different Integers in a String
EasyHash TableString
Watch Solutions40.2% acceptance
1809. Ad-Free Sessions
EasyDatabase
Watch Solutions58.6% acceptance
1812. Determine Color of a Chessboard Square
EasyMathString
Watch Solutions79.8% acceptance
1816. Truncate Sentence
EasyArrayString
Watch Solutions86.7% acceptance
1821. Find Customers With Positive Revenue this Year
EasyDatabase
Watch Solutions87.7% acceptance
1822. Sign of the Product of an Array
EasyArrayMath
Watch Solutions64.8% acceptance
1826. Faulty Sensor
EasyArrayTwo Pointers
Watch Solutions50.2% acceptance
1832. Check if the Sentence Is Pangram
EasyHash TableString
Watch Solutions84.2% acceptance
1844. Replace All Digits with Characters
EasyString
Watch Solutions82.7% acceptance
1848. Minimum Distance to the Target Element
EasyArray
Watch Solutions64.5% acceptance
1853. Convert Date Format
EasyDatabase
Watch Solutions85.6% acceptance
1854. Maximum Population Year
EasyArrayCountingPrefix Sum
Watch Solutions64.4% acceptance
1859. Sorting the Sentence
EasySortingString
Watch Solutions84.1% acceptance
1863. Sum of All Subset XOR Totals
EasyArrayBacktrackingBit Manipulation
Watch Solutions90.1% acceptance
1869. Longer Contiguous Segments of Ones than Zeros
EasyString
Watch Solutions62.4% acceptance
1873. Calculate Special Bonus
EasyDatabase
Watch Solutions57.5% acceptance
1876. Substrings of Size Three with Distinct Characters
EasyCountingHash TableSliding Window
Watch Solutions76.7% acceptance
1880. Check if Word Equals Summation of Two Words
EasyString
Watch Solutions75.2% acceptance
1886. Determine Whether Matrix Can Be Obtained By Rotation
EasyArrayMatrix
Watch Solutions68.2% acceptance
1890. The Latest Login in 2020
EasyDatabase
Watch Solutions77.4% acceptance
1897. Redistribute Characters to Make All Strings Equal
EasyCountingHash TableString
Watch Solutions67.0% acceptance
1903. Largest Odd Number in String
EasyGreedyMathString
Watch Solutions67.7% acceptance
1913. Maximum Product Difference Between Two Pairs
EasyArraySorting
Watch Solutions82.9% acceptance
1920. Build Array from Permutation
EasyArraySimulation
Watch Solutions91.1% acceptance
1925. Count Square Sum Triples
EasyEnumerationMath
Watch Solutions77.2% acceptance
1929. Concatenation of Array
EasyArraySimulation
Watch Solutions90.2% acceptance
1935. Maximum Number of Words You Can Type
EasyHash TableString
Watch Solutions82.9% acceptance
1939. Users That Actively Request Confirmation Messages
EasyDatabase
Watch Solutions56.4% acceptance
1941. Check if All Characters Have Equal Number of Occurrences
EasyCountingHash TableString
Watch Solutions79.4% acceptance
1945. Sum of Digits of String After Convert
EasySimulationString
Watch Solutions74.9% acceptance
1952. Three Divisors
EasyEnumerationMathNumber Theory
Watch Solutions64.6% acceptance
1957. Delete Characters to Make Fancy String
EasyString
Watch Solutions74.1% acceptance
1961. Check If String Is a Prefix of Array
EasyArrayStringTwo Pointers
Watch Solutions52.7% acceptance
1965. Employees With Missing Information
EasyDatabase
Watch Solutions72.6% acceptance
1967. Number of Strings That Appear as Substrings in Word
EasyArrayString
Watch Solutions86.1% acceptance
1971. Find if Path Exists in Graph
EasyBreadth-First SearchDepth-First SearchGraph
Watch Solutions55.5% acceptance
1974. Minimum Time to Type Word Using Special Typewriter
EasyGreedyString
Watch Solutions78.5% acceptance
1978. Employees Whose Manager Left the Company
EasyDatabase
Watch Solutions48.9% acceptance
1979. Find Greatest Common Divisor of Array
EasyArrayMathNumber Theory
Watch Solutions83.4% acceptance
1984. Minimum Difference Between Highest and Lowest of K Scores
EasyArraySliding WindowSorting
Watch Solutions66.2% 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.