In this tutorial, we are going to learn how to distribute n balls for k students without hurting anyone.The idea is simple, we have n balls in different colors that need to be distributed to the students. We don't have to give more than one ball of the same color to any student. If it is possible for a student to get more than one ball of the same color, then distribution should not happen.Let's see an example.Inputn = 10 k = 5 ballsColors = "rrrgbrbgbr"OutputYesNo color is more than the number of students (k). So, no student will get ... Read More

In this tutorial, we are going to write a program that finds the sun of two array elements and store them into a separate array.We have given two arrays and we need to add the corresponding index elements from the two arrays. If the sum is not single digits, then extract the digits from the number and store them in the new array.Let's see an example.Inputarr_one = {1, 2, 32, 4, 5} arr_two = {1, 52, 3}Output2 5 4 3 5 4 5Let's see the steps to solve the problem.Initialize two arrays with dummy data.We are using the vector to ... Read More

In this tutorial, we are going to learn how to find the digital root of a given number.The digital root is the sum of a number of digits (until the sum of the digits becomes a single digit).We are given an integer in string format. And we have to find the sum of the digits repeatedly until the sum becomes a single digit.Let's see the steps to solve the problem.Initialize an integer in the string format.Iterate through the number and add each digit to the sum variable.If the sum is 0, then print 0.Else if the sum is divisible by ... Read More

In this tutorial, we are going to write a program that finds the total number of substrings that starts and ends with the given strings.We are given one string and two substrings. We need to find the different substrings count that starts and ends with the given two substrings. Let's see an example.Inputstr = "getmesomecoffee" start = "m" end = "e"Output6There are a total of 6 different substrings in the given string. They are me, mesome, mesomemecoffe, mesomemecoffee, mecoffe, mecoffee.Let's see the steps to solve the problem.Initialize the strings.Iterate over the str and find the start and end substrings indexes. ... Read More

In this tutorial, we are going to write a program that finds different possible marks for the given n questions with positive and negative marking.Let's say we have 10 questions and each carries 2 marks for correct answers and -1 marks for a negative answer. Our aim is to find all the possible ways in which a student can score in the exam.Let's see the steps to solve the problem.Initialize the number of questions, positive marks for the correct answer and negative marks for the wrong answer.Initialize a set to store the possible marks.Write two inner loops from 0 to ... Read More

In this tutorial, we are going to write a program that helps us to find whether the given matrix is diagonally dominant or not.The matrix is called a diagonally dominant matrix if the sum of elements in the matrix other than the diagonal element is less than the diagonal matrix. Let's see an example.421 352 247The above matrix is a diagonally dominant matrix. Because4 > 2 + 1 5 ≥ 3 + 2 7 > 4 + 2All the diagonal elements are greater than or equal to the sum of the non-diagonal elements in the same row.Let's see the steps ... Read More

In this tutorial, we are going to learn how to find the diagonal of a regular pentagon.We have to find the length of the diagonal of the regular pentagon using the given side. The length of the diagonal of a regular pentagon is 1.22 * s where s is the side of the pentagon.ExampleLet's see the code. Live Demo#include using namespace std; float pentagonDiagonal(float s) {    if (s < 0) {       return -1;    }    return 1.22 * s; } int main() {    float s = 7;    cout

In this tutorial, we are going to learn how to find the diagonal of a regular heptagon.We have to find the length of the diagonal of the regular heptagon using the given side. The length of the diagonal of a regular heptagon is 1.802 * s where s is the side of the heptagon.ExampleLet's see the code. Live Demo#include using namespace std; float heptagonDiagonal(float s) {    if (s < 0) {       return -1;    }    return 1.802 * s; } int main() {    float s = 7;    cout

In this tutorial, we are going to learn how to find the position of a third person on a regular N-sided polygon.We have given a regular N-sided polygon. And there are two persons on two different points already. Our task is to find the third point to place the third person such that the distance between the first two persons and the third person is minimized.Let's see the steps to solve the problem.Initialize the N and two points A and B.Initialize the position of the third person, and the minimum sum to find the position.Iterate from 1 to N.If the ... Read More

In this tutorial, we are going to learn how to find the determinant of a matrix.Let's see the steps to find the determinant of a matrix.Initialize the matrix.Write a function to find the determinant of the matrix.If the size of the matrix is 1 or 2, then find the determinant of the matrix. It's a straightforward thing.Initialize variables for determinant, submatrix, sign.Iterate from 1 to the size of the matrix N.Find the submatrix for the current matrix element.All the elements that are not in the current element row and columnAdd the product of the current element and its cofactor to ... Read More