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Articles on Trending Technologies
Technical articles with clear explanations and examples
Find most significant set bit of a number in C++
Here we will see if a number is given, then how to find the value of Most Significant Bit value, that is set. The value is power of 2. So if the number is 10, MSB value will be 8.We have to find the position of MSB, then find the value of the number with a set-bit at kth position.Example#include #include using namespace std; int msbBitValue(int n) { int k = (int)(log2(n)); return (int)(pow(2, k)); } int main() { int n = 150; cout
Read MoreFind middle of singly linked list Recursively in C++
Consider we have a list of numbers; our task is to find the middle of the linked list using recursion. So if the list elements are [12, 14, 18, 36, 96, 25, 62], then the middle element is 36.To solve this problem, we will count total number of nodes in the list in recursive manner and do half of this. Then rolling back through recursion decrement n by 1 in each call, return element where n is zero.Example#include #include using namespace std; class Node{ public: int data; Node *next; }; Node* getNode(int data){ ...
Read MoreFind maximum element of each row in a matrix in C++
Consider we have a matrix, our task is to find the maximum element of each row of that matrix and print them. This task is simple. For each row, reset the max, and find the max element, and print it. Let us see the code for better understanding.Example#include #define MAX 10 using namespace std; void largestInEachRow(int mat[][MAX], int rows, int cols) { for (int i = 0; i < rows; i++) { int max_row_element = mat[i][0]; for (int j = 1; j < cols; j++) { if (mat[i][j] > max_row_element) max_row_element = mat[i][j]; } cout
Read MoreFind maximum element of each column in a matrix in C++
Consider we have a matrix, our task is to find the maximum element of each column of that matrix and print them. This task is simple. For each column, reset the max, and find the max element, and print it. Let us see the code for better understanding.Example#include #define MAX 10 using namespace std; void largestInEachCol(int mat[][MAX], int rows, int cols) { for (int i = 0; i < cols; i++) { int max_col_element = mat[0][i]; for (int j = 1; j < rows; j++) { if (mat[j][i] > max_col_element) max_col_element = mat[j][i]; } cout
Read MoreFind last element after deleting every second element in array of n integers in C++
Consider we have one circular array containing integers from 1 to n. Find the last element, that would remain in the list after deleting every second element starting from first element. If the input is 5, then array will be [1, 2, 3, 4, 5]. Start from 1. After deleting each second element will be like −1 0 3 4 5 1 0 3 0 5 0 0 3 0 5 0 0 3 0 0So the element that remains in the list is 3.We will solve this problem using recursion. Suppose n is even. The numbers 2, 4, 6 ...
Read MoreFind largest element from array without using conditional operator in C++
Suppose we have an array A with some elements. We have to find the largest element in the array A, but the constraint is, we cannot use any conditional operator. So if A = [12, 63, 32, 24, 78, 56, 20], then maximum element will be 78.To solve this problem, we will use the bitwise AND operation. at first we will insert one extra element INT_MAX (where all bit is 1) in array. Then we will try to find maximum AND value of any pair from the array. This obtained max value will contain AND value of INT_MAX and largest ...
Read MoreFind k closest elements to a given value in C++
Consider we have an array A with few elements. We have two other value X and k. Our task is to find the k number of nearest elements of X from the array A. If the element X is present in the array, then it will not be shown in the output. If A = [12, 16, 22, 30, 35, 39, 42, 45, 48, 50, 53, 55, 56] and X = 35, k = 4. The output will be 30, 39, 42, 45.To solve this, we will use the binary search approach. Using this we will get the crossover point. ...
Read MoreFind if n can be written as product of k numbers in C++
Suppose we have a number N. We have another number k. We have to check the number can be represented using k numbers or not. Suppose a number 54, and k = 3, then it will print the numbers like [2, 3, 9], if it cannot be represented, then print that.To solve this, we will find all prime factors of N, and store them into a vector, then to find k numbers greater than 1, we check the size of the vector is greater than k or not. If size is less than k, then return -1, otherwise print first ...
Read MoreFind if array can be divided into two subarrays of equal sum in C++
Suppose we have an array A. We have to check whether we can split the array into two parts, whose sum are equal. Suppose the elements are [6, 1, 3, 2, 5], then [6, 1], and [2, 5] can be two subarrays.This problem can be solved easily by following these rules. We have to find the sum of all elements of the array at first, then for each element of the array, we can calculate the right sum by using total_sum – sum of elements found so far.Example#include #include using namespace std; void displaySubArray(int arr[], int left, int right) { cout
Read MoreApply function to every row in a Pandas DataFrame in Python
In this tutorial, we are going to learn about the most common methods of a list i.e.., append() and extend(). Let's see them one by one.apply()It is used to apply a function to every row of a DataFrame. For example, if we want to multiply all the numbers from each and add it as a new column, then apply() method is beneficial. Let's see different ways to achieve it.Example# importing the pandas package import pandas as pd # function to multiply def multiply(x, y): return x * y # creating a dictionary for DataFrame data = { 'Maths': ...
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