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Articles on Trending Technologies
Technical articles with clear explanations and examples
Find number from its divisors in C++
In this problem, we are given an array divisors[] consisting of N integers which are the divisors of a number Num. Our task is to find the number from its divisors.The divisor array does not include 1 and the number.Let’s take an example to understand the problem, Inputdivisors[] = {3, 25, 5, 15}Output75ExplanationThe number 75 has divisors {3, 25, 5, 15}Solution ApproachTo solve the problem, we need to find the number Num using the smallest and largest divisors of the number.Num = smallest * largestFor this, we need to sort the array divisors[] and then find the product of elements ...
Read MoreGolang Program to update the last node value in a linked list.
ExampleApproach to solve this problemStep 1 − Define a method that accepts the head of a linked list.Step 2 − If head == nil, return the head.Step 3 − Else, update the last node value to 41.Examplepackage main import "fmt" type Node struct { value int next *Node } func NewNode(value int, next *Node) *Node{ var n Node n.value = value n.next = next return &n } func TraverseLinkedList(head *Node){ temp := head for temp != nil { fmt.Printf("%d ", temp.value) temp = temp.next } ...
Read MoreHow to find the row and column index of a character value in an R data frame?
To find the row and column index for a numerical value in an R data frame we use which function and if the value is character then the same function will be used but we need to pass the value appropriately. For example, if we have a data frame called df that contains a value say Data then we can find the row and column index of Data by using the command as which(df=="Data", arr.ind=TRUE).Example1Consider the below data frame −> x1 x2 df1 df1Output x1 x2 1 Female 5 2 Female 5 3 Female 6 4 Female 6 ...
Read MoreFind number of days between two given dates in C++
In this problem, we are given two arrays date1[] and date2 consisting of 3 integers which denote the DD-MM-YYYY of daes. Our task is to find the number of days between two given dates.Let’s take an example to understand the problem, Inputdate1[] = {13, 3, 2021}, date2[] = {24, 5, 2023}Output802ExplanationThe difference is 2 years , 2 months (3 - 5) and 11 days.2*356 + (30 + 31) + 11 = 802Solution ApproachA simple solution to the problem is by looping, starting from the start date date1 to date2 counting the number of days. And returning the value. This approach ...
Read MoreGolang Program to insert a new node after the Kth node.
ExamplesAdd node 15 after 10 value node.Approach to solve this problemStep 1 − Define a method that accepts the head of a linked list.Step 2 − If head == nil, return the head.Step 3 − Iterate the given linked list.Step 4 − If temp.value is 10, then add the node 15 as the next node.Step 5 − If node value 10 is not found, return the head without adding any node.Examplepackage main import "fmt" type Node struct { value int next *Node } func NewNode(value int, next *Node) *Node{ var n Node n.value = value ...
Read MoreHow to split month and year from 6-digit numbers in an R data frame column?
Sometimes we get data that is not in the form to proceed with the analysis and one such situation is dates stored in 6-digit numbers as 202105 that represents fifth month of year 2021 instead of date format as 2021/05. Therefore, we need to split the date and extract the month and year from the number. This can be done easily with the help of transform function as shown in the below examples.Example1Consider the below data frame −> Date Response1 df1 df1Output Date Response1 1 202103 0.946367628 2 202103 1.241718518 3 202101 -0.657920816 4 202103 -0.809622853 5 ...
Read MoreFind number of endless points in C++
In this problem, we are given two dimensional arrays mat[n][m]. Our task is to find the number of endless points in the matrix.Any point of the matrix is said to be endless if its next elements are 1. i.e.mat[i][j] is endless when mat[i+1][j] … mat[n][j] and mat[i][j+1] … mat[i][m] are 1.Let’s take an example to understand the problem, Inputmat[][] = {0, 0} {1, 1}Output2ExplanationElement mat[0][1] and mat[1][1] are endless.Solution ApproachA simple solution to the problem is by iterating all elements of the matrix. And for each element check if the current element is endless or not. If yes, increase count. ...
Read MoreGolang program to delete the node after the Kth node.
ExamplesDelete node after 10 value node.Approach to solve this problemStep 1 − Define a method that accepts the head of a linked list.Step 2 − If head == nil, return the head.Step 3 − Iterate the given linked list.Step 4 − If temp.value is 10, then override that node’s next value with its next node’s next value.Step 5 − If node value 10 is not found, return the head without deleting any node.Examplepackage main import "fmt" type Node struct { value int next *Node } func NewNode(value int, next *Node) *Node{ var n Node n.value = ...
Read MoreFind number of Positional Elements in C++
In this problem, we are given two dimensional arrays mat[n][m]. Our task is to find the number of positional elements.An element is said to be a positional element if the element is either maximum or minimum element of the row or column.Let’s take an example to understand the problem, Inputmat[][] = {2, 5, 7} {1, 3, 4} {5, 1, 3}Output8ExplanationElements 2, 5, 7, 1, 4, 5, 1, 3 are positional elements.Solution ApproachA simple solution to the problem is by storing the maximum and minimum element of each row and column. And then check for the condition and count the number.Program ...
Read MoreGolang Program to update the node value after the Kth node.
ExamplesUpdate node after k=10 value nodeApproach to solve this problemStep 1 − Define a method that accepts the head of a linked list.Step 2 − If head == nil, return the head.Step 3 − Iterate the given linked list.Step 4 − If temp.value is 10, then update temp.next.value=data.Step 5 − If node value 10 is not found, return the head without updating any node.Examplepackage main import "fmt" type Node struct { value int next *Node } func NewNode(value int, next *Node) *Node{ var n Node n.value = value n.next = next return &n } ...
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