shefin

Xenon is a great alchemist. Recently, he has decided to perform a special type of transmutation. But...

DigitDP Hard 13/18/47

There is a shop named Chocolove in the Codeland. There are many chocolates in the shop. Each chocola...

Bitmask, DP Moderate 7/10/21

Walt and Gus have a great rivalry. Recently Gus has developed a cryptographic system. Walt is trying...

NumberTheory Moderate 14/99/327

Meena is a talented girl in her class. She likes to brainstorm in her leisure times. One day, she wa...

Implementation, NumberTheory Moderate 10/11/24

Byteland has a network of nnn computers that forms a tree structure. A tree is a connected graph tha...

Moderate 1/2/2

Alice and Bob have an array aaa of nnn integers. They decide to play a game with the array. In one m...

Implementation 175/183/241

You are a businessman who is fond of Vinia GPU. You buy Vinia GPUs from Byteland and sell them to Bi...

80/90/155

Okabe Rintarou, the mad scientist is doing research to find the most desired Steins Gate. Besides be...

Adhoc, BinarySearch, Interactive Moderate 2/9/73

Bita has learned bitwise-operations recently. She is doing some experiments with these operations no...

DP, NumberTheory Moderate 33/64/198

Alice and Bob are visiting Byteland. They are observing the map of this country. Surprisingly, the m...

FFT, Graph, PersistentSegmentTree Moderate 3/3/6

Mind flayer, the shadow monster has attacked the town of Hawkins again. This time, the mind flayer h...

BinarySearch Very Easy 27/36/84

You have a jug and nnn mugs. The jug’s capacity is ccc liters and the ithi^{th}ith mug’s capacity is...

0/5/18

Shahwat is a very good problem solver. He is very famous in his city. In any problem, the mayor asks...

120/240/987

Mr. Rik is a famous space traveler. He lives in a galaxy named Victa. There are many planets in this...

Graph, MatrixExponentiation Easy 10/15/28

While traveling in dreamland, you've met the highly skilled master of kung fu, "Master Shifu&qu...

Moderate 2/3/20

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

DisjointSets Moderate 5/5/18

Nafis is working on a mathematical project. But he is stuck on a step of it. In this step, numerous ...

Implementation Moderate 16/105/275

Bob is the owner of a shop named "Color Maker". He has 256 types of watercolor in his shop...

BinarySearch, Hashing Moderate 16/21/201

You are given a tree with NNN vertices. A tree is a connected undirected graph without cycles. The t...

DFS, Tree Moderate 10/12/36

You are given a tree with NNN nodes. A non-negative weight is assigned to each edge of the tree. Let...

DataStructure, LowestCommonAncestor, Trie Hard 9/12/36