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
901. Online Stock Span	Solve	Medium	Adobe+2	Data Stream Design+2
904. Fruit Into Baskets	Solve	Medium	Amazon	Array Hash Table+1
907. Sum of Subarray Minimums	Solve	Medium	Amazon+8	Array Dynamic Programming+2
909. Snakes and Ladders	Solve	Medium	Adobe+6	Array Breadth-First Search+1
910. Smallest Range II	Solve	Medium	Adobe+3	Array Greedy+2
911. Online Election	Solve	Medium	Atlassian+1	Array Binary Search+2
912. Sort an Array	Solve	Medium	Amazon+1	Array Bucket Sort+6
915. Partition Array into Disjoint Intervals	Solve	Medium	Amazon+1	Array
916. Word Subsets	Solve	Medium	Adobe+2	Array Hash Table+1
918. Maximum Sum Circular Subarray	Solve	Medium	Alibaba+4	Array Divide and Conquer+3
919. Complete Binary Tree Inserter	Solve	Medium	Facebook+3	Binary Tree Breadth-First Search+2
921. Minimum Add to Make Parentheses Valid	Solve	Medium	Amazon+3	Greedy Stack+1
923. 3Sum With Multiplicity	Solve	Medium	Adobe+1	Array Counting+3
926. Flip String to Monotone Increasing	Solve	Medium	Amazon+2	Dynamic Programming String
930. Binary Subarrays With Sum	Solve	Medium	Amazon+4	Array Hash Table+2
931. Minimum Falling Path Sum	Solve	Medium	Google	Array Dynamic Programming+1
932. Beautiful Array	Solve	Medium	Google	Array Divide and Conquer+1
934. Shortest Bridge	Solve	Medium	Dell+5	Array Breadth-First Search+2
935. Knight Dialer	Solve	Medium	Amazon+5	Dynamic Programming
937. Reorder Data in Log Files	Solve	Medium	Amazon+1	Array Sorting+1
939. Minimum Area Rectangle	Solve	Medium	Facebook+2	Array Geometry+3
945. Minimum Increment to Make Array Unique	Solve	Medium	Coursera+1	Array Counting+2
946. Validate Stack Sequences	Solve	Medium	Amazon+2	Array Simulation+1
947. Most Stones Removed with Same Row or Column	Solve	Medium	Amazon+3	Depth-First Search Graph+2
948. Bag of Tokens	Solve	Medium	Adobe+3	Array Greedy+2
949. Largest Time for Given Digits	Solve	Medium	Amazon+3	Array Enumeration+1
950. Reveal Cards In Increasing Order	Solve	Medium	Adobe	Array Queue+2
951. Flip Equivalent Binary Trees	Solve	Medium	Google	Binary Tree Depth-First Search+1
954. Array of Doubled Pairs	Solve	Medium	Google	Array Greedy+2
955. Delete Columns to Make Sorted II	Solve	Medium	Google	Array Greedy+1
957. Prison Cells After N Days	Solve	Medium	SAP	Array Bit Manipulation+2
958. Check Completeness of a Binary Tree	Solve	Medium	Facebook	Binary Tree Breadth-First Search+1
959. Regions Cut By Slashes	Solve	Medium	Amazon+1	Array Breadth-First Search+4
962. Maximum Width Ramp	Solve	Medium	Amazon+1	Array Monotonic Stack+1
963. Minimum Area Rectangle II	Solve	Medium	Google	Array Geometry+1
966. Vowel Spellchecker	Solve	Medium	Thumbtack	Array Hash Table+1
967. Numbers With Same Consecutive Differences	Solve	Medium	Adobe+6	Backtracking Breadth-First Search
969. Pancake Sorting	Solve	Medium	Amazon+1	Array Greedy+2
970. Powerful Integers	Solve	Medium	Amazon	Enumeration Hash Table+1
971. Flip Binary Tree To Match Preorder Traversal	Solve	Medium	Amazon	Binary Tree Depth-First Search+1
973. K Closest Points to Origin	Solve	Medium	Amazon+6	Array Divide and Conquer+5
974. Subarray Sums Divisible by K	Solve	Medium	Amazon+3	Array Hash Table+1
978. Longest Turbulent Subarray	Solve	Medium	-	Array Dynamic Programming+1
979. Distribute Coins in Binary Tree	Solve	Medium	Amazon+3	Binary Tree Depth-First Search+1
981. Time Based Key-Value Store	Solve	Medium	Amazon+5	Binary Search Design+2
983. Minimum Cost For Tickets	Solve	Medium	Google	Array Dynamic Programming
984. String Without AAA or BBB	Solve	Medium	Zalando	Greedy String
985. Sum of Even Numbers After Queries	Solve	Medium	Indeed	Array Simulation
986. Interval List Intersections	Solve	Medium	Amazon+7	Array Two Pointers
988. Smallest String Starting From Leaf	Solve	Medium	Apple	Backtracking Binary Tree+3