Neat Brackets
Given a sequence of opening and closing parentheses ("(" and ")") you will have to determine if it i...
Exists or Not Exists
You will be given some numbers. Then there will contain some queries. In every query there will be g...
MEXimum
Let’s get straight to the point. You are given a tree. In the tree, each node u has a number au​ ass...
Matching Brackets
You will be given a sequence of opening and closing brackets of different types ((, ), [, ], {, and ...
Set Union
Given two sets of integers, print the set containing the union of the two input sets. For example, g...
Final Days of Goldfinger
We see agent Bond once again being called in time of a great need. The vile criminal Auric Goldfinge...
Primary Key
"Clarity-Lon" is the new awesome e-commerce based startup that went to the top of the chart within f...
Earthquake!
Most houses are not as safe as they could be. Earthquake engineering is an interdisciplinary branch ...
New Year Couple
The new year 2017 is here. To celebrate the 31st night, Mr Rio has thrown a big party at his house. ...
Smallest Subarray
You are given an array A of N integers A1, A2, A3, ..., AN . If we select two indices (1 ≤ i ≤ j ≤ N...
Special Pair
Mr. X is an “array pagla” person. He loves doing different types of things with arrays. Today Mr. X ...
Another Update-Query Problem
You will be given an array A of length N and you will have to perform Q operations on that array. Th...
Mario and Princess Peach
The world of Mario can be imagined as 2D grid of $N$ rows and $M$ columns--containing a total of $N ...
Distinctness
A substring of string S is another string S' which occurs in string S. For example: S = aaba and one...
Smart Query Handler
Bit operators perform bit-wise operations between two binary numbers. Wikipedia says, binary operati...
Distinct Dishting
You are given an array of $N$ integers. Then there will be $Q$ commands of the following type: Cha...
Expandable ListView
Minas is working on his new language. He want to add a feature call expandable listview. Here he exp...
Rio and Inversion
One day Rio was returning home from his university and unfortunately lost his phone on the way. He a...
Subarray Sum
You are given an array having N integers. You have to select at most K positions in the array and re...
Sofdor Ali and Bracket Sequence
Sofdor Ali has invented a new game. He asked his assistant Jong Bahadur ( who happens to be a monkey...
Cut the Rope
Fahim is a rope seller. He has a special tool for cutting ropes. But recently this tool is behaving ...
Battle of Endor
After myriad battles and death of million rebel soldiers, it is high time to destroy the imperial ar...
Array Simulation
You are given an array of N elements. Initially all the indices have a value of 0. You have to do fo...
Maintain the Queue
“Ajob Desh” is a strange country. Anyone who wants to buy train tickets need to go to the railway st...
Subset of Sequences
You will be given a set of sequences. Each sequence is a list of numbers. Two sequences are K-simila...
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