Problems

3,848+ problems · 928 Easy · 2014 Medium · 906 Hard

Title	Solution	Practice	Difficulty	Companies	Topics
751. IP to CIDR	Solution	Solve	Medium	Airbnb+3	Bit Manipulation String
752. Open the Lock	Solution	Solve	Medium	Amazon+16	Array Breadth-First Search+2
753. Cracking the Safe	Solution	Solve	Hard	Google	Depth-First Search Eulerian Circuit+1
754. Reach a Number	Solution	Solve	Medium	Amazon+7	Binary Search Math
755. Pour Water	Solution	Solve	Medium	Airbnb+1	Array Simulation
756. Pyramid Transition Matrix	Solution	Solve	Medium	Airbnb+2	Bit Manipulation Breadth-First Search+1
757. Set Intersection Size At Least Two	Solution	Solve	Hard	Amazon+5	Array Greedy+1
758. Bold Words in String	Solution	Solve	Medium	Google	Array Hash Table+3
759. Employee Free Time	Solution	Solve	Hard	Airbnb+12	Array Heap (Priority Queue)+1
760. Find Anagram Mappings	Solution	Solve	Easy	Google	Array Hash Table
761. Special Binary String	Solution	Solve	Hard	Adobe+9	Recursion String
762. Prime Number of Set Bits in Binary Representation	Solution	Solve	Easy	Amazon	Bit Manipulation Math
763. Partition Labels	Solution	Solve	Medium	Amazon+8	Greedy Hash Table+2
764. Largest Plus Sign	Solution	Solve	Medium	Meta+1	Array Dynamic Programming
765. Couples Holding Hands	Solution	Solve	Hard	Bloomberg+3	Breadth-First Search Depth-First Search+3
766. Toeplitz Matrix	Solution	Solve	Easy	Bloomberg+4	Array Matrix
767. Reorganize String	Solution	Solve	Medium	Adobe+23	Counting Greedy+4
768. Max Chunks To Make Sorted II	Solution	Solve	Hard	Amazon+4	Array Greedy+3
769. Max Chunks To Make Sorted	Solution	Solve	Medium	Amazon+6	Array Greedy+3
770. Basic Calculator IV	Solution	Solve	Hard	Google+2	Hash Table Math+3
771. Jewels and Stones	Solution	Solve	Easy	Adobe+7	Hash Table String
772. Basic Calculator III	Solution	Solve	Hard	Amazon+13	Math Recursion+2
773. Sliding Puzzle	Solution	Solve	Hard	Airbnb+6	Array Backtracking+4
774. Minimize Max Distance to Gas Station	Solution	Solve	Hard	Amazon+1	Array Binary Search
775. Global and Local Inversions	Solution	Solve	Medium	Amazon	Array Math
776. Split BST	Solution	Solve	Medium	Amazon+1	Binary Search Tree Binary Tree+2
777. Swap Adjacent in LR String	Solution	Solve	Medium	Google+1	String Two Pointers
778. Swim in Rising Water	Solution	Solve	Hard	Amazon+7	Array Binary Search+5
779. K-th Symbol in Grammar	Solution	Solve	Medium	Amazon+6	Bit Manipulation Math+1
780. Reaching Points	Solution	Solve	Hard	Amazon+12	Math
781. Rabbits in Forest	Solution	Solve	Medium	Amazon+8	Array Greedy+2
782. Transform to Chessboard	Solution	Solve	Hard	Citadel+1	Array Bit Manipulation+2
783. Minimum Distance Between BST Nodes	Solution	Solve	Easy	Amazon+3	Binary Search Tree Binary Tree+3
784. Letter Case Permutation	Solution	Solve	Medium	Amazon+6	Backtracking Bit Manipulation+1
785. Is Graph Bipartite?	Solution	Solve	Medium	Amazon+9	Breadth-First Search Depth-First Search+2
786. K-th Smallest Prime Fraction	Solution	Solve	Medium	Amazon+2	Array Binary Search+3
787. Cheapest Flights Within K Stops	Solution	Solve	Medium	Airbnb+17	Breadth-First Search Depth-First Search+4
788. Rotated Digits	Solution	Solve	Medium	Amazon+5	Dynamic Programming Math
789. Escape The Ghosts	Solution	Solve	Medium	Google+1	Array Math
790. Domino and Tromino Tiling	Solution	Solve	Medium	Amazon+4	Dynamic Programming
791. Custom Sort String	Solution	Solve	Medium	Adobe+8	Hash Table Sorting+1
792. Number of Matching Subsequences	Solution	Solve	Medium	Amazon+8	Array Binary Search+5
793. Preimage Size of Factorial Zeroes Function	Solution	Solve	Hard	Adobe	Binary Search Math
794. Valid Tic-Tac-Toe State	Solution	Solve	Medium	Amazon+2	Array Matrix
795. Number of Subarrays with Bounded Maximum	Solution	Solve	Medium	Adobe+4	Array Two Pointers
796. Rotate String	Solution	Solve	Easy	Accenture+12	String String Matching
797. All Paths From Source to Target	Solution	Solve	Medium	Amazon+6	Backtracking Breadth-First Search+2
798. Smallest Rotation with Highest Score	Solution	Solve	Hard	-	Array Prefix Sum
799. Champagne Tower	Solution	Solve	Medium	Amazon+5	Dynamic Programming
800. Similar RGB Color	Solution	Solve	Easy	Google	Enumeration Math+1