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Page 2038 of 2109
Find Right Interval in C++
Suppose we have a of intervals, for each of the interval i, check whether there exists an interval j whose start point is bigger than or equal to the endpoint of the interval i, which can be called that j is on the "right" of i. For any interval i, we have to store the minimum interval j's index, which indicates that the interval j has the minimum start point to build the "right" relationship for interval i. When the interval j doesn't exist, then store -1 for the interval i. And finally, we need output the stored value of ...
Read MoreDelete Leaves With a Given Value in C++
Suppose we have a binary tree and an integer target, we have to delete all the leaf nodes with value target. We have to keep in mind that once we delete a leaf node with a value target if it's parent node becomes a leaf node and has the value target, it should also be deleted (we need to continue doing that until we can't). So if the tree is like below, and the target is 2, then the final tree will be like the last one −To solve this, we will follow these steps −Define a recursive method called ...
Read MoreValid Palindrome in Python
Suppose we have a string with alphanumeric values and symbols. There are lower case and uppercase letters as well. We have to check whether the string is forming a palindrome or not by considering only the lowercase letters (uppercases will be converted into lower case), other symbols like a comma, space will be ignored.Suppose the string is like “A Man, a Plan, a Canal: Panama”, then by considering these rules, it will be “amanaplanacanalpanama”. This is a palindrome.To solve this, follow these steps −define x = “”read each character c in str −if c is lowercase letter or number, then ...
Read MoreMinimum Path Sum in C++
Suppose we have a m x n matrix filled with non-negative integers, find a path from top left corner to bottom right corner which minimizes the sum of all numbers along its path. Movements can only be either down or right at any point in time. So for example, if the matrix is like below131151421The output will be 7, the path will be 1, 3, 1, 1, 1, this will minimize the sumLet us see the steps −a := number of rows, b := number of columnsi := a – 1, j := b - 1while j >= 0matrix[a, j] ...
Read MoreWrite a program to calculate pow(x,n) in C++
In this problem, we are given two integers x and n. Our task is to write a program to calculate the pow(x,n). Let's take an example to understand the problem, Input: x = 5 , n = 3 Output: 125 Example Program to calculate the pow(x,n): #include using namespace std; float myPow(float x, int y) { if (y == 0) return 1; float temp = myPow(x, y / 2); if (y % 2 == 0) return temp * temp; else { if (y > 0) return x * temp * temp; else return (temp * temp) / x; } } int main() { float x = 5; int n = 7; cout
Read MoreZ-Buffer or Depth-Buffer method in C++
The z-buffer also known as depth-buffer is a method that is used for hidden surface detection.Hidden surface detectionFor any picture that has objects and surfaces that are transparent. In this case, objects that are behind other objects are hidden. For proper visual of the image, we need to remove these hidden surfaces is required. The identification is called hidden surface problem.In z-buffer, we will compare surfaces in the z-axis as depths.AlgorithmStep 1: initialize the depth of all pixel max. d(i, j) = infinity Step 2: Initialize color for all pixels. c(i, j) = background-color Step 3: for each ...
Read MorePipes and Cisterns in C++
Pipes and cisterns problem is a very common problem and is generally included in competitive exams. So, learning questions related to pipers and cisterns is important and you should know how to solve them as these are not too difficult to learn.Pipes and cisternsThese problems involve pipes that are used to either fill or empty a tank/reservoir/cistern.Here, are some basics of pipes and cisterns problem, The pipes are inlet pipes or outlet pipes. Inlet pipe fills the tank and the outlet pipe empties the tank.If a pipe fills/empties in ‘n’ hours and the capacity of the tank is ‘c’ liters. ...
Read MorePopular tools for data analytics in C++
Data analytics is the processing of data to extract useful information that supports the machine to make decisions. The processing of data involves cleaning, remodeling, and inspecting data.Data analytics requires high computing power as the data to process is too large. So there are specialized tools for data analytics.Some popular data analytics tools are −R programmingR is one of the best and most widely used tools for data analytics available for all major platforms like Windows, macOS, Unix. It has found usage in data modeling and statistics. Easily manipulation and representation of large data are done using R as it ...
Read MorePortable applications in Cloud and their barriers in C++
Cloud Computing − cloud computing or internet-based computing is storing and accessing of data on virtual servers that are hosted over internet on cloud servers instead of local server.Cloud computing provides the user with an option to use the data on the go. This increases the portability of work i.e. the data and processing of cloud computing can be used anywhere by the user. This is not device and location specific.This feature of cloud computing is important for corporates as they can use cloud services to run projects from virtual locations. The services like IAAS, PAAS, SAAS are used to ...
Read MoreMakeFile in C++ and its applications
In this tutorial, we will be discussing a program to understand MakeFile in C++ and its applications.The task is to break the entire program with MakeFile. It is usually done by making .cpp files and .h files with all the classes/functionalities and link them together.Examplemain.cpp#include #include "function.h" using namespace std; //main execution program int main(){ int num1 = 1; int num2 = 2; cout
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