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C++ Articles
Page 59 of 597
Find if a string starts and ends with another given string in C++
In this problem, we are given two strings str and corStr. Our task is to find if a string starts and ends with another given string. Let’s take an example to understand the problem, Input: str = “abcprogrammingabc” conStr = “abc”Output: TrueSolution Approach: To solve the problem, we need to check if the string starts and ends with the conStr. For this, we will find the length of string and corStr. Then we will check if len(String) > len(conStr), if not return false.Check if prefix and suffix of size corStr are equal and check they contain corStr or not.Program to illustrate the working of ...
Read MoreMaximums from array when the maximum decrements after every access in C++ Program
In this problem, we are given an array arr[] of N integers and an integer m. Our task is to create a program to find the maximums from array when the maximum decrements after every access.Problem Description − We need to find the maximum sum of maximum elements of the array and decrease the max taken by one k times.Let’s take an example to understand the problem, Inputarr[] = {3, 6, 7, 8, 8}, k = 3OutputExplanationFirst iteration: array before = {3, 6, 7, 8, 8}, max = 8, sum = 8, array after update = {3, 6, 7, 7, ...
Read MoreFind if array has an element whose value is half of array sum in C++
In this problem, we are given an array arr of sorted unique values. Our task is to find if array has an element whose value is half of array sum. Problem Description: For the array arr[], we need to find element x in the array such that the sum of all elements of array is equal to 2*X.Let’s take an example to understand the problem, Input: arr[] = {2, 4, 5, 6, 7}Output: NoExplanation: Sum = 2 + 4 + 5 + 6 + 7 = 24No element found.Solution Approach: To solve the problem, we simply need to find the elements which is half of the ...
Read MoreProgram to find number of operations required to remove palindromic sublists in C++
Suppose we have a list of numbers called nums. Now let us consider an operation where we delete some sublist which is a palindrome. We have to find the minimum number of operations required such that the list is empty.So, if the input is like nums = [6, 2, 4, 4, 2, 10, 6], then the output will be 2, as we can remove the sublist [2, 4, 4, 2] first then the list is like [6, 10, 6] this is also a palindrome, so remove it to make list empty.To solve this, we will follow these steps −Define an ...
Read MoreFind if given matrix is Toeplitz or not in C++
In this problem, we are given a 2D square matrix mat[][] of size n*n. Our task is to find if the given matrix is Toeplitz or not.Toeplitz matrix also known as diagonal matrix is a matrix in which the elements at the diagonal start from top-left corner to bottom-right corner.Let’s take an example to understand the problem, Input: Mat[][] = {{3, 5, 1}, {4, 3 ,2}, {1, 2, 3}}Output: YesExplanation: Diagonal : ...
Read MoreProgram to find smallest difference between picked elements from different lists in C++
Suppose we have a list of lists, we have to find the smallest difference that can be formed by picking one value from each of the lists and taking the difference between the maximum and the minimum number of the picked element.So, if the input is like lists = [ [30, 50, 90], [85], [35, 70]], then the output will be 20, as we can take 90, 85, 70 and 90 - 70 = 20To solve this, we will follow these steps −maxVal := -infret := infdefine a priority queue pqn := size of listsfor initialize i := 0, when ...
Read MoreFind if it's possible to rotate the page by an angle or not in C++
In this problem, we are given coordinates of three points that lie on a page. Our task is to find if it’s possible to rotate the page by an angle or not. The rotation of the page is made in such a way that the new position of ‘x’ is the old position of ‘y’, the new position of ‘y’ is the old position of ‘z’. And print “Yes” or “No” based on the rotation.Let’s take an example to understand the problem, Input: x = (0, 1), y = (1, 0), z = (0, -1)Output: YesExplanation:We can rotate the page by 90o.Solution Approach: We ...
Read MoreProgram to find k where given matrix has k by k square of same value in C++
Suppose we have a 2d matrix, we have to find the largest k × k submatrix where all of its elements are containing the same value, then find the value of k.So, if the input is like1183155525554555then the output will be 3, as there is a 3 × 3 square matrix of value 5.To solve this, we will follow these steps −n := row count of matrixm := column count of matrixDefine one 2D array dp of size (n x m) and fill with 1ret := 1for initialize i := n - 1, when i >= 0, update (decrease i ...
Read MoreProgram to Find Out the Minimum Parsing Tree in C++
Suppose we have a list of unique and sorted numbers that represent breakpoints in a string. We want to create a tree out of these rules −There are nodes that have a value (a, b) where a and b are breakpoints. This means the node spans from indices [a, b] in the string.The root node spans over every breakpoint. (the whole string).The spans of a node's left and right child are ordered, contiguous, and contains the parent node's span.Leaf nodes' index of 'a' in breakpoints is 1 before the index of 'b' in breakpoints.The cost of a tree is determined ...
Read MoreProgram to Find Out the Amount of Rain to be Caught between the Valleys in C++
Suppose we have a 2D matrix, where the elements represent the height of a terrain. Let's imagine a situation where it will rain and all the spaces in the valleys get filled up.We have to find out the amount of rain that will be caught between the valleys.So, if the input is like666864586666then the output will be 3 as we can hold 3 units of water in between 4 and 5 squares.To solve this, we will follow these steps −Define a structure Data, that contains x and y coordinate and height hDefine a priority queue pq, it stores data items ...
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