These problems are from a contest organized by Bangladesh Open Source Network on

See details...Standings

B.
Even or Odd You are given an array A of n integers. Find out which of these numbers are even and which ones are ... |

A.
Sum of Roots You are given three positive integers a, b, c. Each of them is a perfect square. Let res = a + b + c... |

E.
Bag Theft Once upon a time, when NHSPC used to happen onsite, a huge number of people used to attend the event... |

F.
Rectangle Game You have a number of rectangular slabs of dimension 2×1. You need to fill up a 3×N sized rectangle u... |

G.
Inspiring Women Hello young programmers,do you know about Firdausi Qadri? She is a Bangladeshi scientist with specia... |

H.
Victory Robot Your school is going to arrange a ceremony to celebrate the upcoming victory day. So the high school... |

I.
Cashback Cashback on payment methods (e.g. credit card) is a common term nowadays. That is, if you pay using ... |

J.
Brush Drawing Arav is a curious young boy. He is learning to draw circles. He only got one color but a lot of brus... |

D.
Future Red Coder Hrittika is a very hardworking girl. She wants to become a red coder, that's why she started practic... |

L.
Need More Shopping? One day, Priyati went to Basundhora shopping mall and saw a digital clock displaying time in some co... |

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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