A.
Diagonal Sum Given an N×N size matrix, you have to re-arrange the elements of the matrix in such a way that the d... |

B.
Haunting of Herobrine Herobrine's horror stories are known by many, but only a few dares to speak that name out loud, for ... |

C.
Easy Summation Little Arya is growing up fast and now she can count the numbers. The problem with her counting is t... |

D.
Don't Show Power Peter loves numbers. But he does not like powers of the numbers. Like he loves 2 but does not like 4...
Moderate
5/6/8 |

E.
Building the Wall Building walls around a country has become a popular modern day trend. The emperor of Promiseland of... |

F.
Fitness Freak Mr. Hoy Rodgeson is the coach of Pinkland Soccer Team (People whisper him being crazy). According to...
Moderate
11/17/41 |

G.
XOR and the Array Given an array of N integers, you need to find out the minimum number of integers that must be added... |

H.
Counting is Difficult 2 East West University Computer Programming Club (EWUCoPC) is arranging an Intra-University Programmin... |

I.
Attacking Drones Bytelandian air force has designed a new weapon system. It is similar to a drone but instead of shoo... |

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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