Problems

3,947+ problems · 946 Easy · 2062 Medium · 939 Hard

Active:Easy· 946 results

Title	Solution	Practice	Difficulty	Companies	Topics
830. Positions of Large Groups	Solution	Solve	Easy	Google	String
832. Flipping an Image	Solution	Solve	Easy	Amazon+5	Array Bit Manipulation+3
836. Rectangle Overlap	Solution	Solve	Easy	Amazon+4	Geometry Math
844. Backspace String Compare	Solution	Solve	Easy	Agoda+14	Simulation Stack+2
859. Buddy Strings	Solution	Solve	Easy	DoorDash+2	Hash Table String
860. Lemonade Change	Solution	Solve	Easy	Amazon+5	Array Greedy
867. Transpose Matrix	Solution	Solve	Easy	Amazon+6	Array Matrix+1
868. Binary Gap	Solution	Solve	Easy	Bloomberg+3	Bit Manipulation
872. Leaf-Similar Trees	Solution	Solve	Easy	Amazon+5	Binary Tree Depth-First Search+1
876. Middle of the Linked List	Solution	Solve	Easy	Accenture+13	Linked List Two Pointers
883. Projection Area of 3D Shapes	Solution	Solve	Easy	Google	Array Geometry+2
884. Uncommon Words from Two Sentences	Solution	Solve	Easy	Amazon+1	Counting Hash Table+1
888. Fair Candy Swap	Solution	Solve	Easy	Amazon+6	Array Binary Search+2
892. Surface Area of 3D Shapes	Solution	Solve	Easy	Amazon	Array Geometry+2
896. Monotonic Array	Solution	Solve	Easy	Amazon+6	Array
897. Increasing Order Search Tree	Solution	Solve	Easy	Amazon+1	Binary Search Tree Binary Tree+3
905. Sort Array By Parity	Solution	Solve	Easy	Amazon+7	Array Sorting+1
908. Smallest Range I	Solution	Solve	Easy	Adobe+2	Array Math
914. X of a Kind in a Deck of Cards	Solution	Solve	Easy	Amazon+2	Array Counting+3
917. Reverse Only Letters	Solution	Solve	Easy	Google+6	String Two Pointers
922. Sort Array By Parity II	Solution	Solve	Easy	Amazon+4	Array Sorting+1
925. Long Pressed Name	Solution	Solve	Easy	Bloomberg+5	String Two Pointers
929. Unique Email Addresses	Solution	Solve	Easy	Amazon+3	Array Hash Table+1
933. Number of Recent Calls	Solution	Solve	Easy	Affirm+9	Data Stream Design+1
938. Range Sum of BST	Solution	Solve	Easy	Amazon+5	Binary Search Tree Binary Tree+2
941. Valid Mountain Array	Solution	Solve	Easy	Amazon+5	Array
942. DI String Match	Solution	Solve	Easy	Amazon+2	Array Greedy+2
944. Delete Columns to Make Sorted	Solution	Solve	Easy	Amazon+3	Array String
953. Verifying an Alien Dictionary	Solution	Solve	Easy	Amazon+9	Array Hash Table+1
961. N-Repeated Element in Size 2N Array	Solution	Solve	Easy	Akamai+5	Array Hash Table
965. Univalued Binary Tree	Solution	Solve	Easy	Box+2	Binary Tree Breadth-First Search+2
976. Largest Perimeter Triangle	Solution	Solve	Easy	Amazon+4	Array Greedy+2
977. Squares of a Sorted Array	Solution	Solve	Easy	Accenture+18	Array Sorting+1
989. Add to Array-Form of Integer	Solution	Solve	Easy	Amazon+5	Array Math
993. Cousins in Binary Tree	Solution	Solve	Easy	Adobe+6	Binary Tree Breadth-First Search+2
997. Find the Town Judge	Solution	Solve	Easy	Amazon+6	Array Graph+1
999. Available Captures for Rook	Solution	Solve	Easy	Google+1	Array Matrix+1
1002. Find Common Characters	Solution	Solve	Easy	Amazon+7	Array Hash Table+1
1005. Maximize Sum Of Array After K Negations	Solution	Solve	Easy	Druva+2	Array Greedy+1
1009. Complement of Base 10 Integer	Solution	Solve	Easy	Bloomberg+3	Bit Manipulation
1013. Partition Array Into Three Parts With Equal Sum	Solution	Solve	Easy	Amazon+5	Array Greedy
1018. Binary Prefix Divisible By 5	Solution	Solve	Easy	Amazon+2	Array Bit Manipulation
1021. Remove Outermost Parentheses	Solution	Solve	Easy	Amazon+5	Stack String
1022. Sum of Root To Leaf Binary Numbers	Solution	Solve	Easy	Amazon+2	Binary Tree Depth-First Search+1
1025. Divisor Game	Solution	Solve	Easy	Amazon+6	Brainteaser Dynamic Programming+2
1030. Matrix Cells in Distance Order	Solution	Solve	Easy	Bloomberg+1	Array Geometry+3
1037. Valid Boomerang	Solution	Solve	Easy	Google+1	Array Geometry+1
1046. Last Stone Weight	Solution	Solve	Easy	Amazon+13	Array Heap (Priority Queue)
1047. Remove All Adjacent Duplicates In String	Solution	Solve	Easy	Amazon+15	Stack String
1050. Actors and Directors Who Cooperated At Least Three Times	Solution	Solve	Easy	Amazon+2	Database