Carrot on a Stick Given a list of numbers, print only the even numbers. |

Hello Regexp Write a regular expression that will match texts like “Hello {X}” and only output “{X}” (w/o quotes)... |

In Brackets Given a line of text, you have to extract the bit of text enclosed within a pair of brackets. There ... |

Odd Screams You will be given a string with one or more a’s. You have to write a regular expression that matches... |

Pairexp Given two numbers, print the number only if both numbers are the same. |

Regular Brackets This problem is matching brackets, but with regular expression. Given a set of parenthesis, if they ... |

That One In the input you will have an integer n (where n is 1, 2, or 3) followed by 3 words. You will have t... |

Three Letter Words Given a line of text find all the three-letter words. |

Two Words Given a line of text (space-separated words), find the first word that appears at least twice in the... |

Vowels Bad, Consonants Good You will be given a line of text. The text will contain space separated words. Identify all the word... |

Within the Span You will be given a snippet of HTML. The HTML will have at most one <span> element. You will have to... |

2Sat, Adhoc, ApolloneasTheorem, Backtracking, BFS, Bignum, BinarySearch, BipartiteMatching, Bitmask, BruteForce, ChineseRemainderTheorem, Combinatorics, ConvexHull, CutVertex, DataStructure, DFS, DigitDP, DisjointSets, DivideAndConquer, DP, Eertree, EulerTour, ExpectedValue, FenwickTree, FFT, Flow, Game, GCD, Geometry, Graph, Greedy, Hashing, HeavyLightDecomposition, Implementation, InclusionExclusion, Interactive, KnuthMorrisPratt, LowestCommonAncestor, Math, Matrix, MatrixExponentiation, MergeSortTree, ModularExponentiation, MOSAlgorithm, MST, NTT, NumberTheory, Parsing, PersistentLiChaoTree, PersistentSegmentTree, PollardRho, PriorityQueue, Probability, Queue, RabinMiller, RangeOrderStatistics, Scheduling, SegmentTree, ShortestPath, Simulation, Sorting, SparseTable, SpragueGrundyTheorem, SqrtDecomposition, Stack, String, StronglyConnectedComponents, SuffixStructure, TernarySearch, Tree, Trie, TwoPointer, WaveletTree

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