Passwords
Alice wants to extract some passwords from a random string. A password can have any number of charac...
Greedy Grid Game
“Uban game world” is an indoor gaming zone. It offers 5 game segments for only one ticket. Today, Al...
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...
Cash Change
You have an unlimited number of cash notes of the following denominations: 1, 5, 10, 50, 100, 500. G...
Game of Strings
Redoan is very fond of strings. He wants to go on a spree of solving string problems. His own teamma...
Misti Chor
Bhootu likes to eat misti. As he is a mischievous kid, he has decided to steal misti from the nearby...
Who Ate the Pizza Slices?
Misty’s life is very dramatic. No matter how careful she is, some interesting and sometimes unfortun...
Find NSUPS
Given a string s, find the number of subsequence in s which forms the word "NSUPS". A subsequence is...
Make More Money
You, the great businessman of TEUB, arrived at ESC land which consists of N cities numbered from 1 t...
Subset AND
You are given an array A of n integers and an integer k. You need to find if there is any non-empty ...
The Hidden Island
It is believed that the hidden island of TreasureLand has many unsolved mysteries and undiscovered t...
Fantastic Food
As we all know that Alice and Bob just landed in Fantastic World and are going to stay for the next ...
BAPG
Russell loves solving math problems and also playing online games. Recently, he has started playing ...
Buildings
There are n buildings in a row. The height of the i-th building is hi​. You have ৳k. It is the amoun...
Hardest Problem Ever
Prof.Dr.DP is very famous professor. He is expert (actually legendary grandmaster) in Dynamic Progra...
Problem Setter Crisis
Competitive Programming is very popular in Leading University. There are many great achievements of ...
Angels and Demons
You are walking at midnight along a road that has N checkpoints numbered from 1 to N from left to ri...
Find the Good Sequence
Let's say two numbers are called "good" if their difference is at least 2. Similarly, a sequence is ...
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...
Déjà Vu
Thor, the Thunder God is fighting a horde of monsters in a cave. The cave is so narrow that it can b...
Flyover in Twinland
Rio has become the president of Twinland. Now he wants to develop his country to fulfill his promise...
Birthday Gifts
Today is Luke's birthday. Mr. Phil Dunphy (Luke's father) has thrown a birthday party for him and de...
Keep It Cool
As the workload of the semester is ramping up you get the task of refilling the fridge in the lab wi...
Greedy Moderate 33/37/89
Permutations and Divisors
Let P be a permutation of length n where each value from 1 to n occurs exactly once. A subsequence o...
Generation Gap
There are n people standing in a queue. The age of the ith person is ai. The more the age gap betwee...
Toph uses cookies. By continuing you agree to our Cookie Policy.