Passwords Alice wants to extract some passwords from a random string. A password can have any number of charac... |

Find the Good Sequence Let's say two numbers are called "good" if their difference is at least 2. Similarly, a sequence is ... |

Permutations and Divisors Let P be a permutation of length n where each value from 1 to n occurs exactly once. A subsequence o... |

Lexicographical Smallest String There is a string $s$ of length $n$ containing lowercase letters and an integer $k$. Among the lette... |

Train Hijack You and your friend Daneliya Tuleshova are planning to hijack a train. Your friend will go inside a... |

Find NSUPS Given a string s, find the number of subsequence in s which forms the word "NSUPS". A subsequence is... |

Fantastic Food As we all know that Alice and Bob just landed in Fantastic World and are going to stay for the next ... |

Darth Vader and 3PO on a Tree! Did you watch Star Wars yet? No? You should in your free time. Now back to Darth Vader and 3PO. Dart... |

Problem Setter Crisis Competitive Programming is very popular in Leading University. There are many great achievements of ... |

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

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... |

Hardest Problem Ever Prof.Dr.DP is very famous professor. He is expert (actually legendary grandmaster) in Dynamic Progra... |

Remember-Remainder Zarin is a sadist. She loves to give problems to her close people. Today she gives you an array cons... |

Ekupai Hacker robot Ekupai is trying to hack a supercomputer. He needs a cheat code X to hack this computer... |

Game of Strings Redoan is very fond of strings. He wants to go on a spree of solving string problems. His own teamma... |

Subset AND You are given an array A of n integers and an integer k. You need to find if there is any non-empty ... |

Estimation of Techboy Techboy works in a software company. He codes in Node.js and React. Every now and then he has to giv... |

Disturbing Students N students were gathered in front of CSEmpur gate. They wanted to take a tour of the famous CSEmpur ... |

Dominoes Forever Once when I was little, my father took me to a tobacco shop! It is surprising, but true. He asked th... |

Buildings There are n buildings in a row. The height of the i-th building is hi. You have ৳k. It is the amoun... |

Assigning Workstations Penelope is part of the admin team of the newly built supercomputer. Her job is to assign work-stati... |

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

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

Road Minister Techboy Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ... |

Déjà Vu Thor, the Thunder God is fighting a horde of monsters in a cave. The cave is so narrow that it can b... |

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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