Coding problems
Algorithm problems with tests in Python, JavaScript, Java, Go and C++, checked on our server.
Adding Digit ListsMediumDrop the K-th Node From the TailMediumZip Two Sorted ChainsEasyMerge Many Sorted ChainsHardTrade Places in TwosMediumReversing a List in BlocksHardMove the Tail to the FrontMediumSorted List, Unique Values OnlyMediumThin Out a Sorted ChainEasySplit a List Around a PivotMediumReverse a Slice of a ListMediumTree From a Sorted ChainMediumTree Into a Right ChainMediumList Folded From Both EndsMediumSorting a List by InsertionMediumSorting a Linked ListMediumCut Out Matching NodesEasyFlip the ChainEasySymmetric Bead StringEasyOdd Positions FirstMediumAdd One to a Digit ChainMediumForward Digit List SumMediumMarked Runs in a ChainMediumMidpoint of a ListEasyNext Larger Down the ListMediumCancel Zero-Sum StretchesMediumValue of a Bit ChainEasyChain Down the TreeMediumKeep Some, Skip SomeEasySplice Into a ListMediumSwap With the Mirror PositionMediumKeep Only One-Off Values in a ListMediumFrom Absolute Order to Actual OrderMediumGaps Between Turning PointsMediumFlip the Even-Sized GroupsMediumCut Out the MiddleMediumMirror Pairs in a ListMediumSums Between ZerosMediumNights of the Withering RowMediumPour a List Into a SpiralMediumLeaders of a ListMediumGCD Between NeighboursMediumDouble the Digit ChainMediumPair Duels Along a ChainEasyHow Often Each Value AppearsEasyPurge Banned ValuesMedium