Bitmask Problems

You are given an array A of n integers (A1, A2 , ... , An) and some queries. In each query, you will...

• By nahidhasan98
• Bitmask, Trie
• Moderate
• 42/57 Solutions
• 163 Submissions

You are given N piles of stones. The piles are numbered 1 to N from left to right. Each pile contain...

• By Nafis_Shhriar
• Bitmask
• Moderate
• 47/60 Solutions
• 143 Submissions

You are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb...

• By nfssdq
• Bitmask, DP
• Hard
• 17/33 Solutions
• 145 Submissions

The protagonists of this problem are two great programmers of a certain institution Omanush and Ordi...

• By jackal_1586
• Bitmask, DP
• Hard
• 27/39 Solutions
• 161 Submissions

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

• By Sherlock221b
• Bitmask, Combinatorics, Counting, DP
• Hard
• 8/20 Solutions
• 36 Submissions

Alice came up with a new game. In this game called "Candy Quest", there is a NxN size 2D g...

• By Labib666
• Bitmask, DP
• Moderate
• 10/22 Solutions
• 67 Submissions

Bikpiks are very small aliens. Day by day they are becoming very dangerous for human being. They liv...

• By shibly
• Bitmask, ConvexHull, DP, Geometry
• Hard
• 4/4 Solutions
• 86 Submissions

In mathematics, especially in set theory, set A is a subset of set B, or equivalently B is a superse...

• By khatribiru, Bhadra, Bishal_G, mihassan
• Bitmask
• Hard
• 16/19 Solutions
• 88 Submissions

A super shop sells only 26 items, labeled them from ‘A’ to ‘Z’. The shop stores the list of products...

• Bitmask
• Hard
• 18/25 Solutions
• 65 Submissions

There is a shop named Chocolove in the Codeland. There are many chocolates in the shop. Each chocola...

• By shefin
• Bitmask, DP
• Hard
• 7/10 Solutions
• 21 Submissions

This problem is very easy. As my mood is not so good, I will not elaborate the statement unnecessari...

• By tanu_RUET
• Bitmask, DP
• Hard
• 4/35 Solutions
• 198 Submissions

You’ll be given two matrix M1 and M2 and another integer K. The size of both M1 and M2 are N*N and e...

• By flash_7
• Bitmask, Hashing
• Hard
• 46/65 Solutions
• 296 Submissions

Scientists from the planet Krypton have figured out a way to grow artificial sugar in space. They ha...

• By Tanmoy_Datta
• Bitmask, Implementation, Math
• Moderate
• 15/22 Solutions
• 45 Submissions

As you know earth is affected by corona virus. Situation becomes worse day by day .Almost 80% people...

• By recycle_bin
• BinarySearch, Bitmask
• Hard
• 18/21 Solutions
• 49 Submissions

Mr. Hikiko passed his Eid without shopping because of ongoing lockdown. Now, Govt. removed the lockd...

• By Riaz_BSMRSTU
• Bitmask, DP
• Moderate
• 7/10 Solutions
• 32 Submissions

Welcome to Osim's maze! Unfortunately, you are in the maze right now and you want to come outside th...

• By Muhimin_Osim
• Bitmask, DP
• Hard
• 7/10 Solutions
• 35 Submissions

There is a kingdom called DomKi. DomKi has N city and N-1 two-way road. Each city is numbered with 1...

• By prodip_bsmrstu
• Bitmask, DataStructure, Hashing, LowestCommonAncestor, Tree
• Hard
• 6/10 Solutions
• 41 Submissions