Plant Trees, Save Life There are n students in a school. Some of them are friends with each other. You want to make the sch... |

Flow on Tree Mr. Kaboom has recently learned about maximum flow. Now his friend Mr. Taboom gave him this problem.... |

Kingdom - Great Roads of Destiny Shin wants to be the “Great General of the Heaven”. It is his dream. But becoming a “Great General o... |

Act of Random Kindness (Hard) Sammy and Meera liked adventures a lot. Once in a while they used to set out adventures. This time t... |

Weird Graph Anik got a directed acyclic graph with some weird properties. For Every node v of that graph in(v)≤1... |

Wakanda Forever We all know that Thanos has erased half of the population of the universe. Earth’s population was al... |

Metro Rail Blocks The city of Dhaka is experiencing the construction of metro rails. Imagine one such metro rail spans... |

Help to Be Happy A country named Mueawin has one or more villages and one or more people live in every village. Two p... |

C++ Vector Simulation Array is an important data structure in computer science. It is also very important when it comes fo... |

404 Setter Not Found! 😲 Given a 2D 4-connected grid. Each cell contains a value and an identifier. Values can be propagated ... |

Unbelievable Array You will be given an array A of n integers and q operations. There are two types of operations: 1 x... |

Flyover in Twinland Rio has become the president of Twinland. Now he wants to develop his country to fulfill his promise... |

The Archipelago of Mirpur The archipelago of Mirpur consists of N islands. The famous architect PogPog was hired to connect al... |

Poltu and Graph Poltu has got a graph with N nodes and M edges. Every edge has a weight. There can be multiple edges... |

Freezing Trees We heard you like trees. But this problem has no relation to trees being frozen. :D You are given a ... |

Team Forming Ben is the instructor of a camp. He is forming several teams consisting of the students of the camp.... |

Yet Another XOR Problem Given a rooted tree with N nodes where each node has a value, find a pair of nodes (u, v) so that u ... |

Change in Array You will be given an array of length N. Then there will be Q queries. Each query will contain four i... |

Bored?? "Avoid touching your face, particularly your eyes, nose or mouth to prevent the virus from entering ... |

Hashing Shreas has created a new revolutionary hashing function that calculates hash values of graphs. For a... |

MangoSmash Your friend has come to visit the RUET campus. As the Mango season goes on ⋯, he/she said “Mama Aam ... |

Multiverse Of Courier Service Dr. Strange finally discovered a safe way to travel between parallel universes. By noticing people’s... |

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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