Problems
Do You Know LIS? Alam has an array a with n elements a1,a2,…,an and an integer x. For each i (1≤i≤n−1) index i and... |
Infinitely Large Grid One day Joti, Risty and Mithy — three friends were playing with an infinitely large grid together. T... |
The Strange Shopkeeper and His First Loss Once upon a time there was a strange shopkeeper. He used to buy things and sell them with the same a... |
Office Para The streets of Office Para were dark at night because the lamps on the streets weren’t working and t... |
Match the Color 'Subha' is a girl of 5 years old. Already she can recognize almost all of the colors and shapes even... 
Hard
12/12/23 |
Hyperloop Hyperloop is the latest product from Inter Union Pathway Committee. Hyperloop is used to accelerate ...
Moderate
7/9/18 |
Beautiful String You are given a binary string S of length N, and a value K. You need to find a maximum length of a b...
Moderate
6/8/43 |
Weapon Supplier Zorro is the chief in charge of central space station. He supplies weapons to all other space statio... |
Cache Cash You are a software developer in a reputed firm. For a previously written badly optimized module you ...
Moderate
4/7/19 |
Fun With Fraction Dulal is a school going kid. He is learning basic math right now. Today he has learned about divisio...
Moderate
4/6/10 |
Uncle M J's uncle Mr. M is obsessed with statistics. Wherever he finds data he likes to apply statistical an...
Hard
10/10/25 |
Eloa’s Secret Eloa, the princess of Byteland has a secret. She is obsessed with Alien names. The general conventio... |
Chocolate Rounds In a magical Victoryland, there is a princes named “Rowshan” who loves chocolate bar a lot and don’t...
Moderate
11/16/55 |
A Simple Game Saif and Sabi is playing a game in a maze. They will start from 2 different initial points and they ...
Moderate
7/9/30 |
Buzz Lightyear Buzz Lightyear (character from famous movie ‘Toy Story’) is done with inter galactic battle and now ... |
Set the Meeting Three colleagues Motu, Biscuit and Ramjan are in Sundarbans now. They are on a mission to protect th... |
Pudding and Coins Pudding is playing a game that has n levels. There are a total of n(n+1)/2 coins spread out among th... |
Shuvo Noboborsho! "Shuvo Noboborsho" is the traditional greeting for Bengalis in the Bengali new year which means "Hap... |
Switchblade of Thanos We all know that Thanos “The Mad Titan“ had two adopted daughters, Gamora and Nebula. But did you kn... |
Maximum Distance You know it’s hard seeing your favorite person being interested in another one instead of you. At th... |
XOR Is Fun Efa hates numbers. But she loves the XOR operation. This time, you have to solve another problem for... |
Many Paths, Many Costs Alice and Bob are visiting Byteland. They are observing the map of this country. Surprisingly, the m... |
Birthday Present?! As everyone gifts graphs or strings to people on their birthdays, Oyshee’s friends decided to do som... |
Nilkhet You’re planning to start a library for the next n days, where you will rent books to students. Each ... |
Divisible LCM You have a sequence a1, a2, a3, …, an of n integers and q queries. In each query, you are given ... |
Tags
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
