Professional way of Programming
In this post we will write a simple C++ program to concatenate two strings using Pointer, the code is self explanatory with comments for better understanding. Write a C++ program to concatenate two Strings using Pointer: You can also execute this code on our online compiler. #include <iostream> using namespace std; int main() { … Read more
Here we will understand the Mobile Numeric Keypad problem, then we will understand the solution and then write a Program in C++ to implement the solution: GIVEN: A mobile numeric keypad as below: PROBLEM: A digit is given, we have to find the number of possible numbers of given digits can be formed, using the … Read more
Here we will write a program to count the number of non repeating digits in a given range. Let’s start with understanding the problem. Given: A Range starting from L till R. Problem: Find the count of total numbers such that they do not have any repeated digits. Like 123 has no repeated digits but 121, 122, … Read more
Given: Matrix of size MxN, consists of ‘#’, ‘.’ and ‘*’, where: # means blocked path . means walkable path * means points to collect. Problem: To find the maximum points you can grab to reach bottom right of the matrix from top left. Consider you are at the top left of the matrix, you have … Read more
In this post we will understand the problem of Highway Billboard Problem and then we will implement the solution using Dynamic Programming. Problem: Let’s suppose we got a job to place billboards (advertising hoarding) on a National Highway of length M miles. The possible site for billboards are given by numbers x1 < x2 < ….. < … Read more
In this post first we are going to understand the problem to find the length of longest sub-sequence of an array and then we will write a C++ program to implement the same. Let’s understand the problem first: Given: An array arr[ ] of N integers. Problem: To find the length of the longest subsequence … Read more