Problems by shefin

Chocolate

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

Crypto-Number

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

Day-Month-Year

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

Easy Prediction

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

Hououin Kyouma!

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

Is Bita Happy?

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

Mind Flayer Has Attacked Again!

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

No Expectations!

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

Painful Giveaway!

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

Rik, the Space Traveler

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

Subset of Master Shifu

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

Team Forming

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

The Multiplication

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

Watercolor

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

XOR Tree

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

Yet Another XOR Tree Problem

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

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