Buildings

There are n buildings in a row. The height of the i’th building is hi. You have ৳k. It is the amount...

Passwords

Alice wants to extract some passwords from a random string. A password can have any number of charac...

Train Hijack

You and your friend Daneliya Tuleshova are planning to hijack a train. Your friend will go inside a...

String Is Not That Easy

Let’s consider a string S which is obtained by concatenating the non-negative integers from 0 to 102...

BAPG

Russell loves solving math problems and also playing online games. Recently, he has started playing ...

Who Ate the Pizza Slices?

Misty’s life is very dramatic. No matter how careful she is, some interesting and sometimes unfortun...

Flow on Tree

Mr. Kaboom has recently learned about maximum flow. Now his friend Mr. Taboom gave him this problem....

Flyover in Twinland

Rio has become the president of Twinland. Now he wants to develop his country to fulfill his promise...

Darth Vader and 3PO on a Tree!

Did you watch Star Wars yet? No? You should in your free time. Now back to Darth Vader and 3PO. Dart...

Diagonal Sum

Given an N*N size matrix, you have to re-arrange the elements of the matrix in such a way that the d...

Road Minister Techboy

Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ...

Game of Strings

Redoan is very fond of strings. He wants to go on a spree of solving string problems. His own teamma...

Problem Setter Crisis

Competitive Programming is very popular in Leading University. There are many great achievements of ...

Estimation of Techboy

Techboy works in a software company. He codes in Node.js and React. Every now and then he has to giv...

Hardest Problem Ever

Prof.Dr.DP is very famous professor. He is expert (actually legendary grandmaster) in Dynamic Progra...

Find NSUPS

Given a string s, find the number of subsequence in s which forms the word “NSUPS”. A subsequence is...

Déjà Vu

Thor, the Thunder God is fighting a horde of monsters in a cave. The cave is so narrow that it can b...

Ekupai

Hacker robot Ekupai is trying to hack a supercomputer. He needs a cheat code X to hack this computer...

Fantastic Food

As we all know that Alice and Bob just landed in Fantastic World and are going to stay for the next ...

Permutations and Divisors

Let P be a permutation of length n where each value from 1 to n occurs exactly once. A subsequence o...