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Minimum path need to reverse to reach each node in a tree from each vertex
Given a directed tree consisting of N nodes valued from [0, N - 1] and M edges, the task is to find the minimum number of edges that need to reverse for each node X such t...
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Tree
Graph
Mathematical
DFS
DSA
Count of binary arrays of size N with sum of product of adjacent pairs equal to K
Given two integers N and K, the task is to find the total number of possible binary array of size N such that the sum of the product of adjacent pairs in that array is exa...
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Arrays
Dynamic Programming
Competitive Programming
Blogathon
DSA
How Bitcoin Transaction Works?
Bitcoin is basically a digital currency that is currently used as a form of payment. Bitcoin is a cryptocurrency and the transactions related to bitcoins take place in the...
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Picked
Blockchain
How to get Source Code of any website ?
A Website is defined as a collection of web pages. A website can be designed using HTML, CSS, Bootstrap, etc. HTML language decides what will appear on the webpage and CSS...
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Web Technologies
Blogathon
Blogathon-2021
How Does Bitcoin Mining Work?
Bitcoin Mining is the process of verifying bitcoin transactions and storing them in a blockchain(ledger). It is a process similar to gold mining but instead, it is a compu...
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Picked
Blockchain
Python def Keyword
Python def keyword is used to define a function, it is placed before a function name that is provided by the user to create a user-defined function. In Python, a function ...
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Python
Python-Functions
python-basics
Picked
Count of subarrays of size K with average at least M
Given an array arr[] consisting of N integers and two positive integers K and M, the task is to find the number of subarrays of size K whose average is at least M.Examples...
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Arrays
Mathematical
subarray
sliding-window
two-pointer-algorithm
subarray-sum
DSA
Find maximum height to cut all chocolates horizontally such that at least K amount remains
Given an array arr[] consisting of heights of N chocolate bars, the task is to find the maximum height at which the horizontal cut is made to all the chocolates such that ...
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Arrays
Binary Search
Searching
Mathematical
DSA
Length of Smallest Non Prime Subsequence in given numeric String
Given a string S of size N consisting of digits [1, 9], the task is to find the length of the smallest subsequence in the string such that it is not a prime number.Example...
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Strings
Algorithms
Mathematical
Competitive Programming
subsequence
Prime Number
Java Programs
DSA
Maximize sum of LSBs of Bitwise OR of all possible N/2 pairs from given Array
Given an array arr[] consisting of N positive integers, where N is even, the task is to form N/2 pairs such that the sum of the Least Significant Bit of Bitwise OR of all ...
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Arrays
Bit Magic
Mathematical
Bitwise-OR
DSA
Count of Arrays of size N having absolute difference between adjacent elements at most 1
Given a positive integer M and an array arr[] of size N and a few integers are missing in the array represented as -1, the task is to find the count of distinct arrays aft...
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Arrays
Algorithms
Dynamic Programming
Mathematical
permutation
Data Structures
Natural Numbers
DSA
Count of pairs in given range having their ratio equal to ratio of product of their digits
Given two integers L and R, the task is to find the count of unordered pairs of integers (A, B) in the range [L, R] such that the ratio of A and B is the same as the ratio...
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Mathematical
Ratio and Proportion
DSA
Sum Across Multiple Rows and Columns Using dplyr Package in R
In this article, we are going to see how to sum multiple Rows and columns using Dplyr Package in R Programming language.The dplyr package is used to perform simulations in...
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Picked
R Language
R Dplyr
Dplyr - Find Mean for multiple columns in R
In this article, we will discuss how to calculate the mean for multiple columns using dplyr package of R programming language.Functions in useThe mutate() method adds new ...
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R Language
R Dplyr
Dell R&D Interview Experience for SDE
Round 1: Online AssessmentThe Online assessment was conducted via HirePro. It was a 125-minute examination divided into 3 sections. The intersectional switch was not allow...
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Interview Experiences
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