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Programming Articles
Page 3 of 2545
How to print a large number of values in R without index?
Whenever we print any vector then the left-hand side of the R window shows indexing, even if we have one value in the vector the index will be there. For example, if we print a vector that has value equal to 2 then the print output will be [1] 2, here [1] represents the index. If we want to print the vector without index then cat function can be used as shown in the below examples.Example1x1
Read MoreMaximum Sum Increasing Subsequence using DP in C++ program
In this problem, we are given an array arr[] of size n. Our task is to create a program to find the maximum Sum Increasing Subsequence using DP in C++.Problem Description − To find the maximum sum increasing subsequence, we will be creating a subsequence in which the next element is greater than the current element.Let’s take an example to understand the problem, Inputarr[] = {4, 2, 3, 6, 5, 9}Output20ExplanationIncreasing subsequence with maximum sum: {2, 3, 6, 9} = 2 + 3 + 6 + 9 = 20Solution ApproachTo solve the problem using a dynamic Program Approach. We will ...
Read MoreFind number of subarrays with even sum in C++
In this problem, we are given an array arr[] consisting of N elements. Our task is to find the subarray with even sum.Let’s take an example to understand the problem,Inputarr[] = {2, 1, 3, 4, 2, 5}Output28ExplanationThe subarrays are −{2}, {4}, {2}, {2, 4}, {2, 2}, {1, 3}, {1, 5}, {3, 5}, {4, 2}, {2, 1, 3}, {2, 1, 5}, {2, 3, 5}, {2, 4, 2}, {1, 3, 4}, {1, 3, 2}, {1, 4, 5}, {1, 2, 5}, {3, 4, 5}, {3, 2, 5}, {2, 1, 3, 4}, {2, 1, 3, 2}, {2, 3, 4, 5}, {2, 3, 2, 5}, {2, 4, 2, 5}, {1, 3, 4, 2}, {1, 4, 2, 5}, {3, 4, 2, 5}, {2, 1, 3, 4, 2}, {2, 1, 3, 4, 2, 5}Solution ApproachA simple solution to the problem is using the direct method which is by calculating all subarray and their sums. And the increase count for the subarray with even sum. And at last return count.Program to illustrate the working of our solution,Example#include using namespace std; int countEvenSumSubArray(int arr[], int n){ int evenSumCount = 0, sum = 0; for (int i=0; i
Read MoreHow to change the repeated row names and column names to a sequence in a matrix in R?
To change the repeated row names and column names to a sequence, we first need to read those names in a vector then set them to row names and column names with make.unique function. For example, if a matrix has row names defined as A, B, A, B, A then it can be converted into A, B, A.1, B.1, A.2.Example1M1
Read MoreWhat is the difference between creating a matrix by using matrix function or as.matrix function in R?
The difference between as.matrix and matrix function is that nrow argument or ncol argument are not helpful with as.matrix function but with matrix function we can use them. Therefore, we can actual define a matrix with matrix function but if we have a data frame or data table then it can be converted to matrix by using as.matrix function.Examples of creating matrix with as.matrix and matrix functionExample1M
Read MoreFind maximum possible stolen value from houses in C++
In this problem, we are given n houses with some values in them. Our task is to Find the maximum possible stolen value from houses.Problem Description − We have an array houses[] that consist of the values that are in each house. A thief robs the houses but he cannot steal from two adjacent houses as neighbours know about the theft. We need to find the maximum possible value that can be stolen by the thief from the house without getting caught.Let’s take an example to understand the problem, Inputhouses[] = {5, 2, 1, 6, 7, 9, 4, 3}Output23ExplanationThe max ...
Read MoreFind maximum value of Sum( i*arr[i]) with only rotations on given array allowed in C++
In this problem, we are given an array arr[] consisting of n elements. We need to Find maximum value of Sum( i*arr[i]) with only rotations on a given array allowed. For find the maximum sum of (i*arr[i]), we can perform any number of rotations.Let’s take an example to understand the problem, Inputarr[] = {4, 1, 3, 7, 2}Output43ExplanationWe will rotate the array once to get the maximum value, After rotation array will be {2, 4, 1, 3, 7}Sum = 0*2 + 1*4 + 2*1 + 3*3 + 4*7 = 0 + 4 + 2 + 9 + 28 = 43Solution ...
Read MoreFind maximum XOR of given integer in a stream of integers in C++
In this problem, we are given Q queries each of which is one of the following type, Type 1 − insertion (1, i) to add the element with value i, in your data structure.Type 2 − findXOR (2, i), to find the XOR of all elements of the data structure with the element i.The data structure should contain only 1 element initially which will be 0.Let’s take an example to understand the problem, InputQueries: (1, 9), (1, 3), (1, 7), (2, 8), (1, 5), (2, 12)Output15 15ExplanationSolving each query, (1, 9) => data structure => {9} (1, 3) => data ...
Read MoreFind Maximum XOR value of a sub-array of size k in C++
In this problem, we are given an array arr[] consisting of n elements and an integer k. Our task is to find the Maximum XOR value of a sub-array of size k.Let’s take an example to understand the problem, Inputarr[] = {3, 1, 6, 2 ,7, 9} k = 3Output12ExplanationAll subarray and the xor of all element of size k, {3, 1, 6} = 4 {1, 6, 2} = 5 {6, 2, 7} = 3 {2, 7, 9} = 12Solution ApproachA simple solution to the problem is by using two loops. One to iterate over the array and other to ...
Read MoreHow to concatenate two or more vectors in R?
The concatenation of vectors can be done by using combination function c. For example, if we have three vectors x, y, z then the concatenation of these vectors can be done as c(x,y,z). Also, we can concatenate different types of vectors at the same time using the same same function.Example1set.seed(999) x1
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