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
1801. Number of Orders in the Backlog	Solve	Medium	Robinhood	Array Heap (Priority Queue)+1
1802. Maximum Value at a Given Index in a Bounded Array	Solve	Medium	Microsoft+1	Binary Search Greedy
1803. Count Pairs With XOR in a Range	Solve	Hard	Google+1	Array Bit Manipulation+1
1804. Implement Trie II (Prefix Tree)	Solve	Medium	Apple+1	Design Hash Table+2
1805. Number of Different Integers in a String	Solve	Easy	Expedia	Hash Table String
1806. Minimum Number of Operations to Reinitialize a Permutation	Solve	Medium	Google	Array Math+1
1807. Evaluate the Bracket Pairs of a String	Solve	Medium	Google	Array Hash Table+1
1808. Maximize Number of Nice Divisors	Solve	Hard	Microsoft	Math Number Theory+1
1809. Ad-Free Sessions	Solve	Easy	Amazon	Database
1810. Minimum Path Cost in a Hidden Grid	Solve	Medium	Facebook+1	Breadth-First Search Depth-First Search+3
1811. Find Interview Candidates	Solve	Medium	Amazon	Database
1812. Determine Color of a Chessboard Square	Solve	Easy	JPMorgan	Math String
1813. Sentence Similarity III	Solve	Medium	Google	Array String+1
1814. Count Nice Pairs in an Array	Solve	Medium	Navi+2	Array Counting+2
1815. Maximum Number of Groups Getting Fresh Donuts	Solve	Hard	Google	Array Bit Manipulation+3
1816. Truncate Sentence	Solve	Easy	Bloomberg	Array String
1817. Finding the Users Active Minutes	Solve	Medium	Twitter	Array Hash Table
1818. Minimum Absolute Sum Difference	Solve	Medium	Uber	Array Binary Search+2
1819. Number of Different Subsequences GCDs	Solve	Hard	Akuna Capital	Array Counting+2
1820. Maximum Number of Accepted Invitations	Solve	Medium	Bloomberg+1	Array Depth-First Search+2
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
1823. Find the Winner of the Circular Game	Solve	Medium	Bloomberg+1	Array Math+3
1824. Minimum Sideway Jumps	Solve	Medium	Bytedance+1	Array Dynamic Programming+1
1825. Finding MK Average	Solve	Hard	Google	Data Stream Design+3
1826. Faulty Sensor	Solve	Easy	Facebook	Array Two Pointers
1827. Minimum Operations to Make the Array Increasing	Solve	Easy	Apple+1	Array Greedy
1828. Queries on Number of Points Inside a Circle	Solve	Medium	Google	Array Geometry+1
1829. Maximum XOR for Each Query	Solve	Medium	Uber	Array Bit Manipulation+1
1830. Minimum Number of Operations to Make String Sorted	Solve	Hard	Samsung	Combinatorics Math+1
1831. Maximum Transaction Each Day	Solve	Medium	-	Database
1832. Check if the Sentence Is Pangram	Solve	Easy	Facebook+1	Hash Table String
1833. Maximum Ice Cream Bars	Solve	Medium	Amazon	Array Counting Sort+2
1834. Single-Threaded CPU	Solve	Medium	Amazon+2	Array Heap (Priority Queue)+1
1835. Find XOR Sum of All Pairs Bitwise AND	Solve	Hard	Mobisy	Array Bit Manipulation+1
1836. Remove Duplicates From an Unsorted Linked List	Solve	Medium	Goldman Sachs+1	Hash Table Linked List
1837. Sum of Digits in Base K	Solve	Easy	-	Math
1838. Frequency of the Most Frequent Element	Solve	Medium	Adobe+7	Array Binary Search+4
1839. Longest Substring Of All Vowels in Order	Solve	Medium	Thomson Reuters	Sliding Window String
1840. Maximum Building Height	Solve	Hard	Dataminr	Array Math+1
1841. League Statistics	Solve	Medium	-	Database
1842. Next Palindrome Using Same Digits	Solve	Hard	Amazon+1	String Two Pointers
1843. Suspicious Bank Accounts	Solve	Medium	JPMorgan and Chase	Database
1844. Replace All Digits with Characters	Solve	Easy	Adobe+1	String
1845. Seat Reservation Manager	Solve	Medium	Dropbox	Design Heap (Priority Queue)
1846. Maximum Element After Decreasing and Rearranging	Solve	Medium	Amazon	Array Greedy+1
1847. Closest Room	Solve	Hard	Amazon	Array Binary Search+2
1848. Minimum Distance to the Target Element	Solve	Easy	Honeywell	Array
1849. Splitting a String Into Descending Consecutive Values	Solve	Medium	-	Backtracking String
1850. Minimum Adjacent Swaps to Reach the Kth Smallest Number	Solve	Medium	Amazon+1	Greedy String+1