Dashboard Questions Topics Companies Sheets

Data Structures & Algorithms

Practice 3,374+ coding problems from top companies. Master DSA concepts and ace your interviews.

3,374

Problems

840

Easy

1762

Medium

772

Hard

Difficulty

All3374 Easy840 Medium1762 Hard772

Title	Solve	Difficulty	Companies	Topics
1789. Primary Department for Each Employee	Solve	Easy	-	Database
1790. Check if One String Swap Can Make Strings Equal	Solve	Easy	Facebook	Counting Hash Table+1
1791. Find Center of Star Graph	Solve	Easy	Microsoft	Graph
1795. Rearrange Products Table	Solve	Easy	Amazon+2	Database
1796. Second Largest Digit in a String	Solve	Easy	Softwire	Hash Table String
1800. Maximum Ascending Subarray Sum	Solve	Easy	tcs	Array
1805. Number of Different Integers in a String	Solve	Easy	Expedia	Hash Table String
1809. Ad-Free Sessions	Solve	Easy	Amazon	Database
1812. Determine Color of a Chessboard Square	Solve	Easy	JPMorgan	Math String
1816. Truncate Sentence	Solve	Easy	Bloomberg	Array String
1821. Find Customers With Positive Revenue this Year	Solve	Easy	Google	Database
1822. Sign of the Product of an Array	Solve	Easy	Microsoft	Array Math
1826. Faulty Sensor	Solve	Easy	Facebook	Array Two Pointers
1827. Minimum Operations to Make the Array Increasing	Solve	Easy	Apple+1	Array Greedy
1832. Check if the Sentence Is Pangram	Solve	Easy	Facebook+1	Hash Table String
1837. Sum of Digits in Base K	Solve	Easy	-	Math
1844. Replace All Digits with Characters	Solve	Easy	Adobe+1	String
1848. Minimum Distance to the Target Element	Solve	Easy	Honeywell	Array
1853. Convert Date Format	Solve	Easy	-	Database
1854. Maximum Population Year	Solve	Easy	Bloomberg+2	Array Counting+1
1859. Sorting the Sentence	Solve	Easy	Adobe+1	Sorting String
1863. Sum of All Subset XOR Totals	Solve	Easy	Adobe	Array Backtracking+4
1869. Longer Contiguous Segments of Ones than Zeros	Solve	Easy	Amazon	String
1873. Calculate Special Bonus	Solve	Easy	Apple	Database
1876. Substrings of Size Three with Distinct Characters	Solve	Easy	Quora	Counting Hash Table+2
1880. Check if Word Equals Summation of Two Words	Solve	Easy	-	String
1886. Determine Whether Matrix Can Be Obtained By Rotation	Solve	Easy	Adobe	Array Matrix
1890. The Latest Login in 2020	Solve	Easy	-	Database
1893. Check if All the Integers in a Range Are Covered	Solve	Easy	Bloomberg	Array Hash Table+1
1897. Redistribute Characters to Make All Strings Equal	Solve	Easy	Moengage	Counting Hash Table+1
1903. Largest Odd Number in String	Solve	Easy	Adobe+1	Greedy Math+1
1909. Remove One Element to Make the Array Strictly Increasing	Solve	Easy	Facebook	Array
1913. Maximum Product Difference Between Two Pairs	Solve	Easy	Apple	Array Sorting
1920. Build Array from Permutation	Solve	Easy	Adobe+3	Array Simulation
1925. Count Square Sum Triples	Solve	Easy	Amazon	Enumeration Math
1929. Concatenation of Array	Solve	Easy	Adobe+1	Array Simulation
1933. Check if String Is Decomposable Into Value-Equal Substrings	Solve	Easy	-	String
1935. Maximum Number of Words You Can Type	Solve	Easy	Quora	Hash Table String
1939. Users That Actively Request Confirmation Messages	Solve	Easy	-	Database
1941. Check if All Characters Have Equal Number of Occurrences	Solve	Easy	Bolt	Counting Hash Table+1
1945. Sum of Digits of String After Convert	Solve	Easy	Microsoft	Simulation String
1952. Three Divisors	Solve	Easy	Microsoft	Enumeration Math+1
1957. Delete Characters to Make Fancy String	Solve	Easy	Wayfair	String
1961. Check If String Is a Prefix of Array	Solve	Easy	Uber	Array String+1
1965. Employees With Missing Information	Solve	Easy	Adobe	Database
1967. Number of Strings That Appear as Substrings in Word	Solve	Easy	Uber	Array String
1971. Find if Path Exists in Graph	Solve	Easy	Amazon+2	Breadth-First Search Depth-First Search+2
1974. Minimum Time to Type Word Using Special Typewriter	Solve	Easy	TikTok	Greedy String
1978. Employees Whose Manager Left the Company	Solve	Easy	Adobe	Database
1979. Find Greatest Common Divisor of Array	Solve	Easy	TIAA	Array Math+1