Combinatorics Problems

Rosi Vidmun is a greedy landlord who likes to grab as much land as he can. Currently he has PPP squa...

Ariful_Efath Counting, NumberTheory Moderate 27/33/113

Moriarty is bored again. When he gets bored, the only thing he wants to do is play with Sherlock. So...

Sherlock221b Counting, NumberTheory Moderate 24/44/208

Ever since that wicked thief took away some of her murgis (hens, that is), Meena was ever anxious th...

Mesbah Combinatorics, DP Easy 191/282/645

The world is terrified by Pandas! After a miraculous chemical explosion, they became smarter; and ev...

mehdi_ Combinatorics, Counting, NumberTheory Moderate 8/9/97

Mr. Meme has recently moved to a foreign country named "Gloryland" for study purpose. Ther...

Combinatorics Moderate 79/103/238

Alice likes playing with Palindromes (strings that read the same backward as forward, such as 'madam...

Sherlock221b Combinatorics, Counting Moderate 3/6/28

As some of you already know, Nocu City has a history of having bad neighbors. These bad ones, take a...

TarifEzaz Combinatorics, Counting Moderate 6/7/78

Everyone know about Mina & Raju. They are siblings as well as good friend. The friend-circle of ...

emrul_mu Combinatorics, DP Moderate 38/51/201

Mr. Ant has 3 boxes and the infinite number of marbles. Now he wants to know the number of ways he c...

Alim14 Combinatorics, Counting Moderate 6/17/32

The world-renowned Swedish Chef is planning a gourmet three-course dinner for some muppets: a starte...

Bignum, Combinatorics Moderate 3/3/4

In the strange neighborhood of Nocu, a lot of people lives pretty happily, or so they think. Like mo...

TarifEzaz Combinatorics, Counting Moderate 9/16/35

The problem statement is so small. Give you four integers r, a, b, d. Find the summation of all numb...

hasan169 Combinatorics Very Easy 38/118/691

Fear no more, this is a problem of geometry! When Moyna was little, he had a math teacher named Shuk...

TarifEzaz BruteForce, Combinatorics, Geometry 485/597/1k

You are at the top left corner [position (1,1)(1,1)(1,1)] of a R×CR \times CR×C grid. Your destinati...

Kryptonyte Combinatorics, Counting Moderate 11/19/67

Little Oishee loves to watch TV. But her mother, who is a math teacher, doesn't like this at all. Sh...

IamHot Combinatorics, Counting Moderate 38/51/179

Let P = C(N,0) - C(N,1) + C(N,2) - C(N,3) + ... + C(N,N); where C(n,r) is "n choose r". Yo...

Alim14 Combinatorics, Counting Moderate 80/101/259

You are playing a game that has 16 levels. You start with level 1 and after gaining a certain amount...

noor148 Combinatorics Moderate 24/29/108

You will be given a set of sequences. Each sequence is a list of numbers. Two sequences are K-simila...

ridowan007 Combinatorics, Counting, DataStructure Moderate 20/28/318

Prof. Bari loves to play with string. He is also very skilled in drawing. One day he was drawing a g...

Combinatorics Moderate 15/33/83

Mr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...

ridowan007 Combinatorics, Counting, DP Moderate 110/138/231

There is an N*N grid where (r,c) denotes a cell number where r means row number, c means column numb...

liar_rakib Combinatorics 33/88/373

"There was a break-in of Gringotts Wizarding Bank on 1 May, 1998, during the height of the Seco...

Sherlock221b Bitmask, Combinatorics, Counting, DP Moderate 8/20/36

East West University Computer Programming Club (EWUCoPC) is arranging an Intra-University Programmin...

Combinatorics Moderate 29/73/457

Milo has a string S of length L. Tutu picks a random prefix and Mota picks a random suffix of S. Now...

Combinatorics, Counting Moderate 9/20/31

There are n people busy with arranging the upcoming Inter Department Programming Contest (IDPC) 2016...

Bhadra Combinatorics, Counting Easy 9/12/35