RememberRemainderZarin is a sadist. She loves to give problems to her close people. Today she gives you an array cons...

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

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

String Is Not That EasyLet’s consider a string S which is obtained by concatenating the nonnegative integers from 0 to 102...

Problem Setter CrisisCompetitive Programming is very popular in Leading University. There are many great achievements of ...

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

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

Subset ANDYou are given an array A of n integers and an integer k. You need to find if there is any nonempty ...

Diagonal SumGiven an N*N size matrix, you have to rearrange the elements of the matrix in such a way that the d...

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

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

Flyover in TwinlandRio 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. Dar... 
Road Minister TechboyTechboy is appointed as the minister of roads and highway in his country BetterNotNameIt. Now he ... 
Game of StringsRedoan is very fond of strings. He wants to go on a spree of solving string problems. His own teamma...

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

Déjà VuThor, the Thunder God is fighting a horde of monsters in a cave. The cave is so narrow that it c...
