A.
Tom Is a Good Mentor Today is the first day of the little mouse Jerry at school. Famous mathematician Tom is his teacher.... |

B.
Konami Code The Konami code is a sequence of key/button presses that is implemented in many video games to unloc... |

C.
Palindrome and Queries You'll be given an array A of N strings containing lowercase English letters only and Q queries. In ... |

D.
Crypto-Number Walt and Gus have a great rivalry. Recently Gus has developed a cryptographic system. Walt is trying... |

E.
Easy This problem is very easy. As my mood is not so good, I will not elaborate the statement unnecessari... |

F.
Hello Choto Bondhu! Let's play a game. I will give you a number n. You will have to tell me n2. Okay, it may seem diffic... |

G.
The Depressed Guy There is a guy named "Lucky" who is depressed now. His friend Jack knows why he is depressed. He has... |

H.
Birthday Gifts Today is Luke's birthday. Mr. Phil Dunphy (Luke's father) has thrown a birthday party for him and de... |

I.
Chow, Mo Mo, the jumper has found an extraordinary tree in the woods. He absolutely loves it. He already has ... |

J.
Circle of Death Abir is a school going boy, who loves math. Also, he loves to play with stones. Recently he invented... |

K.
A Girl Has No Name "Joffrey... Cersei... Ilyn Payne... the Houn.." - Arya Stark Garden of Bones, Game of Thrones S02E04... |

Practice contests allow you to re-run contests and experience them as close as possible to the original run.

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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