Coding problems

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

Where the Fragment StartsTwo Pointers · String · String MatchingEasy Palindrome by Adding Letters in FrontString · String Matching · Hash FunctionHard Whole Copies of a BlockString · String MatchingEasy A Copy Inside the TreeTree · Depth-First Search · Binary TreeEasy Highlight Search HitsTrie · Array · Hash TableMedium Repeat a Word Until It FitsString · String MatchingMedium Highlight Search TermsTrie · Array · Hash TableMedium Match After ShiftsString · String MatchingEasy Capitals Follow the PatternTrie · Array · Two PointersMedium Start That Matches the EndString · String Matching · Hash FunctionHard Strings in a Range Without a Banned WordString · Dynamic Programming · String MatchingHard Words Hidden in OthersArray · String · String MatchingEasy First Word With a Given BeginningTwo Pointers · String · String MatchingEasy Longest Back-to-Back RunString · Dynamic Programming · String MatchingEasy Pieces in Order Inside an ArrayGreedy · Array · Two PointersMedium Words With a Given StartArray · String · String MatchingEasy Suffixes Echoing the StartString · Binary Search · String MatchingHard Pattern With Allowed SwapsArray · Hash Table · StringHard Peel Off a Repeated StartString · Dynamic Programming · String MatchingHard Tail to the FrontMath · String · Dynamic ProgrammingHard Anchor Near a CompanionTwo Pointers · String · Binary SearchMedium Word Near an AnchorTwo Pointers · String · Binary SearchHard Word on a ConveyorString · String Matching · Hash FunctionMedium Chop and AppendString · String Matching · Hash FunctionHard Spot the Price TrendArray · String Matching · Hash FunctionMedium Spot the Price Trend in a Long HistoryArray · String Matching · Hash FunctionHard Bookend Word PairsTrie · Array · StringEasy Framing Word PairsTrie · Array · StringHard Target From Word BeginningsTrie · Segment Tree · ArrayMedium Phrase From Word Beginnings, Long EditionSegment Tree · Array · StringHard First Window With One TypoString · String MatchingHard Pattern With GapsString · String MatchingEasy Shortest Match for a Two-Star PatternTwo Pointers · String · Binary SearchHard Smallest String by a Match PlanGreedy · String · String MatchingHard