Problems
Invertible Construction You are given two integers n and k. We define an operation on a r×c binary matrix as follows: Choos... |
Realm of Numericon In the mysterious Realm of Numericon, a group of ancient mathematicians discovered a unique pattern ... |
Anina's Christmas Tree This Christmas Anina and her friends have decided to make some Christmas trees to decorate her town.... |
Missing String This is an Interactive Problem. The judge has a secret binary string S of length n(1≤n≤1000). You ca... |
Fuel Finance X Game Studio is working on their next super-hit game. The game is quite simple. The player has a ca... |
Call a Meeting Alice and Bob are hosting a programming contest in Abiland. All the judges live in different cities ... |
Brain Fold (Hard) Shandyna loves nerd sniping. (Don’t worry, she only does it in safe enviroments.) Last time she got ... 
Moderate
1/3/4 |
Around the Track In order to compare race tracks, we wish to compute their lengths. A racetrack is strictly two-dimen... |
Faisal and His Playgrounds Faisal is a famous ice hockey player. He plays his game all across the world. But his favorite groun... |
Pera in CSEmpur Who does not like a short and precise problem statement? Atleast everyone in CSEmpur does. You are g... |
ACT 1: Ash Counting Trees Ash Ketchum has a weird rooted tree (read Notes sections if you don't know about tree data structure... |
Buckets of Water In Abby's area the water is available in the tap only from 6AM to 8AM. So, Abby thought she would st... |
Plantik It is Argentina vs France in the football world cup final of 2022 in a parallel universe. You are a ... |
Challenging Case Officer Rahman, a mysterious character, often gets into trouble. He faced the most dangerous crimina... |
AI Empire This is the year 3202. 300 years ago, AI got so much smart that AI took control over its creators. N... |
The Very Last Exam You have spent the last twenty years studying competitive programming. Now only one exam stands betw... |
Ankara Messi It is Argentina vs Croatia in the football world cup semifinal of 2022 in a parallel universe. The f... |
Schrödinger's Brightness Antman is in the quantum realm. He has n orbits which are concentric and circular. These are called ... |
Doctor Strange in the Circleverse At the beginning of time, there were only two circles in the circleverse (a universe where everyone ... |
Rotated Square You are given N 2D points, and some query 2D points. For each query point you need to find the area ... |
Lighthouse 2 Safwan is the new governor of the country Homeland. Homeland is formed with a set of N islands where... |
Difficult Game Of String Today we will talk about two friends and a difficult game. For this problem, let's think their names... |
Pairs in Tree You will be given a tree of N nodes. Each node has a given value and the distance between adjacent n... |
Polices Raided on Town! There are N shops in a town named “The Worst-Model-Town”. The owner of the i’th shop is A[i]. One da... |
Broken Chain Jahid loves Motorbikes. He really wants to have a bike of his own. So he requests his elder brother ... |
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
