# Problems from Replay of National High School Programming Contest 2021

These problems are from a contest hosted on . See details...

#### A. Jewel the Magician

Jewel is a promising magician. Recently, he has learned a technique to mesmerize his audience. Let's...

#### B. Hidden Graph

There is an unweighted, undirected hidden graph. You are given an integer range from LLL to RRR. The...

#### C. Shortest Path Recovery

Mr. Biscuit is in trouble. He accidentally deleted all the programs in his server and his database i...

#### D. The Need for Seed

The Need for Seed is a racing video game set in the fictional Fortune City. You, as a player of the ...

#### E. List of Strings

Initially you have an empty list DDD. In this problem you will be asked to execute three types of qu...

#### F. Count the Deliveries

Lazim has recently decided to open a pizza restaurant. His restaurant’s speciality is that they can ...

#### G. 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...

#### H. Rotation and Queries

You will be given a string S consisting of lowercase English characters and N queries. In each query...

#### I. Fair Share

Alice and Bob are playing a game on an array AAA of NNN integers. The game lasts for KKK rounds. Eac...

#### J. Shopping Mania

Shapla and Jui have entered the final round of Shopping Mania, an annual shopping game played by two...

#### K. Stick Race

It is the annual sports event in your school. There is an event going on named ‘‘Stick Race’’. This ...

#### L. F

You are given an integer sequence a1,a2,…,ana_1, a_2,\ldots, a_na1​,a2​,…,an​. For any non-negative ...