A.
Alice vs. Bob We have found an Idea to end the everlasting rivalry between Alice and Bob. We will give them a list... |

B.
Grid Grid markup is a process, where each of the grid cells is marked with a star symbol *. Your task is ... |

C.
Candy Boxes Mehdi won a million dollars lottery, and not knowing what to do with such big amounts of money, he b... |

D.
CloX Given two clocks with no digits printed on them and only two hands, one smaller for hour and one big... |

E.
A Game of Two Coins There are N players (numbered from 1 to N) sitting around a round table. Player 2 is sitting at the ...
Moderate
15/19/60 |

F.
Factorial Generator Mr. Ong wants to develop a factorial generator machine, which input takes as a 62-bit integer, and o... |

G.
Game of Triangles In order to overcome the boredom during the Covid19 lockdown, you have created a small but clever ga... |

H.
File Cleanup Recently I have noticed that my hard drive was getting filled and it is high time I did some cleanup... |

I.
Meena and Random Choice Meena has an array of length N (1-indexed). The numbers of the array are arranged from left to right... |

J.
Many Roads The mighty river ByteStream runs through the fertile lands of ByteLands. The 2N cities of ByteLand a... |

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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