Dengue
Once upon a time there was a king. He had a huge kingdom and the king was very kind. All of his subj...
Absolute Value
You will be given an integer x. The absolute value of x will be within 100. You have to add 1 to x's...
Chief Thief
A group of thieves steal only money. Every morning they deposit the money to their leader. The leade...
Hello Choto Bondhu!
Let's play a game. I will give you a number n. You will have to tell me n2. Okay, it may seem diffic...
Circle of Death
Abir is a school going boy, who loves math. Also, he loves to play with stones. Recently he invented...
Bad Boy Ekhlas
Ekhlas is a bad boy, not the type of bad that you generally admire. When he was little, his primary ...
Most Difficult Problem Ever
You are given a function like below: long long F(int A, int B, int C, long long x) { long long res =...
Spot It!
Have you played the game Spot it!? Though there are many ways to play this game, the basic rule is t...
Power and Mod
Exponentiation is a mathematical operation, written as b n , involving two numbers, the base b and t...
Sofdor Ali and Histogram
The Great Sofdor Ali is now interested in competitive programming. Seeing this, his friend and also ...
Playing With Your Mind
Given a non-negative integers N. You have to find an integer P such that, the following conditions s...
Easy Summation
Little Arya is growing up fast and now she can count the numbers. The problem with her counting is t...
Red and Green
Suppose, there is an array of N integers. Each index of the array is either red or green. The first ...
Permutations and Divisors
Let P be a permutation of length n where each value from 1 to n occurs exactly once. A subsequence o...
The Reminder to Expect
Do you know Trevor Philips? Well he is a mad guy who gets mad at everything. Recently he got mad at ...
Boltu vs Balti
Boltu and Balti are two friends. Boltu is a great programmer whereas Balti is a newbie programmer. B...
How Many Ways?
Regular problem solvers starts their journey by solving ad hoc and number theory. After getting the ...
A Girl's Story
Meena (Bengali: মীনা) is a fictional character who stars in the South Asian children's television sh...
Khataraina is Back!
Last year we helped Adnan with his girlfriend Khataraina’s issue. This year she caused another troub...
Recursive World!
See following the two recursive functions: C(0) = 0 C(1) = 5 C(K) = C(K-1) + 4 F(0) = 1 F(1) = 2 F(N...
Arithmetic Sequence (Hard)
Arithmetic Sequence is a sequence of numbers where the difference between two consecutive numbers ar...
Math Very Easy 274/292/483
Circle and Square
Meena and Raju are learning about different shapes. Meena's favourite shape is Circle while Raju lik...
N Factorial!
I like short descriptions and I think you so too. Let's say you have a number, N. Now try to find th...
Meena Meets The Marauders
December 14, 1975 Hogwarts School of Witchcraft and Wizardry It’s been a long long day. The Marauder...
Squares Inside Square
Hello , Programmers. There is one thing that I don't like about competitive problem solving, which i...
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