Make Strings Great Again! Do you know what is a sub-sequence? A sub-sequence is a sequence that can be derived from another se... |
Mr. Hikiko and a Strange Game (Hard) Mr. Hikiko recently downloaded a strange game on his phone from a store. This game is quite interest... |
Cent Savings To host a regional contest like NWERC a lot of preparation is necessary: organizing rooms and comput... |
On My Way One fine morning you discovered yourself standing in a maze. The maze can be considered a connected ... |
Erik: The Candyboy - 1 Erik has N candies, and he wants to distribute those candies among his friends. But he has more frie... |
Alternative Subsequence: The Extension Recall that the sequence b is a subsequence of the sequence a, if b can be derived from a by removin... |
This Is Business “Why brother why…?” “This is Business …” You have started a cupcake factory where two types of cupca... |
Video Game Pro Shefin is playing a video game. In this game, there will be $N$ buildings in a row. $i^{th}$ buildin... |
Milad's Lost Tree Milad likes trees so much. He has a rooted tree with $n$ vertices each of which has some non-negativ... |
Pathetic Interview II You all know about the story of Pathetic Interview-I. Today, I am sharing a story of my close friend... |
Paranoid Trading You have been newly appointed as the accountant of Michael Corleone - the famous mafia boss. Your ta... |
Mix and Merge You are given an array A of n elements and a constant k. You can perform the following operation on ... |
Easy Sequence 2 Let’s define a easy sequence F. Where $ F(1) = 1 $ $ F(2X) = F(X)^2 + 1 $ $ F(2X+1) = F(X) \times F(... |
Subarray Sum You are given an array having N integers. You have to select at most K positions in the array and re... |
OCD Returns! This problem author has OCD (obsessive–compulsive disorder). One day his teacher gave him an array o... |
Fivefold Removals Alice and Bob are playing a simple game on marbles. They have a bucket containing N marbles, and the... |
Help Chokro Pias and Chokro are good friends. Pias's birthday is coming soon. So, Chokro wants to gift Pias an a... |
Buckets of Water In Abby's area the water is available in the tap only from 6AM to 8AM. So, Abby thought she would st... |
Penguins of Madagascar One day the penguins of Madagascar found a string S... Wait... Wait. Actually the setter of the prob... |
Unique Relief Thanos has now figured out how to visit all the houses in the flood-affected area. However, now he h... |
Game of Tic-Tac-Toe Alice and Bob is a playing a game of tic-tac-toe, to be precise a variant of tic-tac-toe called Nota... |
Find NSUPS Given a string s, find the number of subsequence in s which forms the word "NSUPS". A subsequence is... |
Osim's Maze Welcome to Osim's maze! Unfortunately, you are in the maze right now and you want to come outside th... |
Counting Murgis Ever since that wicked thief took away some of her murgis (hens, that is), Meena was ever anxious th... |
Naughty Subsequence - V2.0 Mahib loves ‘Naughty Subsequence’-s. He will give you an array of characters ara[0,1,...,n-1] that c... |