COVID19 OutbreakCOVID19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...

Itsy's Magic CardsItsy needs your help with her magic cards. Her magic cards grant her special spiderwitch powers. Un...

Color The GraphYou are given an acyclic, bidirectional graph with NNN nodes and M edges. The nodes are numbered fro...

Ghosh vs DattaAbout two hundred years ago, a serious dispute evoked between the two neighboring colonies of Khulna...

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

War in the Wizarding WorldThere is a deadly war going on between two countries (Bitland and Byteland) in the wizarding world. ...

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

Bad XOR 2 (Hard)So after successfully becoming many people's nightmare, XOR has struck again, this time to haunt you...

Elementary MathEllen is teaching elementary math to her students and the time for the final exam has come. The exam...

ExplosionThere is a house named Larcana. It is a very weird house .There are exactly N rooms in total and bet...

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...

Zer VS EEEZer is a programmer who has a friend named Nir. Nir always shows off how great EEE is. One day Nir c...

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

Sofdor Ali's Black and White TreeSofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...

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

Stephen, Bob, and Tomato's CanvasIf Stephen Hawking was right, then there is a universe where Bob Ross is a student of Tomato Yoshi. ...

Spanning TreeThere are N nodes in a tree. You can start from any node of that tree and you have to come back to t...

Flow FinderLast summer, Carla the Cartographer went on an expedition on behalf of the National Center for Posit...

Unfair Robot RaceTwo teams of robots, Team A and Team B, are racing in a 2D grid. There will be a total of 6 rounds. ...

Prime AvoiderMr. X is a friend of Hafiz bhai. Mr. X loves to play with numbers in his leisure but he hates prime ...

Kingdom of CodeKingdom CODE is the most peaceful place in the universe. King NOVOSH and Queen ALMIDA is ruling this...

MonoMonoYou have probably heard of the famous board game, Monopoly. According to Wikipedia, in this game, pl...

Keep MovingBalurmath is a city which has N interesting tourist spots, which are connected between themselves by...

Traveling Policy of AjobdeshIn Ajobdesh, there are multiple cities and one of them is considered as the capital city. Obviously,...

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