Coding problems

Algorithm problems with tests in Python, JavaScript, Java, Go and C++, checked on our server.

Pair With a Target SumArray · Hash TableEasy Median Across Two ArraysArray · Binary Search · Divide and ConquerHard Two Boards Holding WaterGreedy · Array · Two PointersMedium Zero-Sum TriplesArray · Two Pointers · SortingMedium Triple Sum Nearest the TargetArray · Two Pointers · SortingMedium Four Numbers to a TargetArray · Two Pointers · SortingMedium Squeeze Repeats Out of a Sorted ArrayArray · Two PointersEasy Drop the Unwanted ValueArray · Two PointersEasy Next Arrangement in OrderArray · Two PointersMedium Find in a Shifted Sorted ArrayArray · Binary SearchMedium First and Last CopyArray · Binary SearchMedium Slot on a Sorted ShelfArray · Binary SearchEasy Sudoku Board Without ClashesArray · Hash Table · MatrixMedium Complete the SudokuArray · Hash Table · BacktrackingHard Weight Sets for an Exact LoadArray · BacktrackingMedium Card Hands for an Exact TotalArray · BacktrackingMedium Smallest Absent PositiveArray · Hash TableHard Water Between WallsStack · Array · Two PointersHard Fewest Jumps to the EndGreedy · Array · Dynamic ProgrammingMedium All OrderingsArray · BacktrackingMedium Distinct Orderings With RepeatsArray · Backtracking · SortingMedium Turn a Square ClockwiseArray · Math · MatrixMedium Anagram BucketsArray · Hash Table · StringMedium Peaceful QueensArray · BacktrackingHard Most Profitable StreakArray · Divide and Conquer · Dynamic ProgrammingMedium Spiral ReadoutArray · Matrix · SimulationMedium Reach the Last CellGreedy · Array · Dynamic ProgrammingMedium Merging Room BookingsArray · SortingMedium Fitting In a New BookingArrayMedium Spiral-Numbered SquareArray · Matrix · SimulationMedium Warehouse Cart RoutesArray · Dynamic Programming · MatrixMedium Cheapest Corner-to-Corner RouteArray · Dynamic Programming · MatrixMedium Add One to a Digit ArrayArray · MathEasy Justify the LinesArray · String · SimulationHard Zero Out the CrossesArray · Hash Table · MatrixMedium Find in a Row-Chained GridArray · Binary Search · MatrixMedium Flags in Three ColorsArray · Two Pointers · SortingMedium Every Topping ComboBit Manipulation · Array · BacktrackingMedium Word Traced on a Letter GridDepth-First Search · Array · StringMedium At Most Two CopiesArray · Two PointersMedium Find in a Shifted Array With RepeatsArray · Binary SearchMedium Biggest Rectangle Under the SkylineStack · Array · Monotonic StackHard Biggest Solid Panel BlockStack · Array · Dynamic ProgrammingHard Merge Into the Spare TailArray · Two Pointers · SortingEasy All Distinct Card HandsBit Manipulation · Array · BacktrackingMedium Tree From Pre-Order and In-Order WalksTree · Array · Hash TableMedium Tree From In-Order and Post-Order WalksTree · Array · Hash TableMedium Balanced Tree from a Sorted ListTree · Binary Search Tree · ArrayEasy Rows of the Number PyramidArray · Dynamic ProgrammingEasy A Single Row of the Number PyramidArray · Dynamic ProgrammingEasy

1 of 36 · 1760 problems