Marc’s Cakewalk in Algorithm | HackerRank Programming Solutions | HackerRank Problem Solving Solutions in Java [💯Correct]

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Algorithm Hackerrank Solution | Hackerrank Java Solution

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In this post, you will find the solution for Marc’s Cakewalk in Java-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

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Introduction To Algorithm

The word Algorithm means “a process or set of rules to be followed in calculations or other problem-solving operations”. Therefore Algorithm refers to a set of rules/instructions that step-by-step define how a work is to be executed upon in order to get the expected results. 

Advantages of Algorithms:

  • It is easy to understand.
  • Algorithm is a step-wise representation of a solution to a given problem.
  • In Algorithm the problem is broken down into smaller pieces or steps hence, it is easier for the programmer to convert it into an actual program.

Link for the Problem – Marc’s Cakewalk – Hacker Rank Solution 

Marc's Cakewalk – Hacker Rank Solution

Problem:

Marc loves cupcakes, but he also likes to stay fit. Each cupcake has a calorie count, and Marc can walk a distance to expend those calories. If Marc has eaten  cupcakes so far, after eating a cupcake with  calories he must walk at least  miles to maintain his weight.

Example

image 101

Function Description

Complete the marcsCakewalk function in the editor below.

marcsCakewalk has the following parameter(s):

  • int calorie[n]: the calorie counts for each cupcake

Returns

  • long: the minimum miles necessary

Input Format

The first line contains an integer , the number of cupcakes in .
The second line contains  space-separated integers, .

Constraints

image 103

Sample Input 0

3
1 3 2

Sample Output 0

11

Explanation 0

Let’s say the number of miles Marc must walk to maintain his weight is . He can minimize  by eating the  cupcakes in the following order:

  1. Eat the cupcake with  calories, so .
  2. Eat the cupcake with  calories, so .
  3. Eat the cupcake with  calories, so .

We then print the final value of , which is , as our answer.

Sample Input 1

4
7 4 9 6

Sample Output 1

79

Explanation 1

image 102
Marc's Cakewalk – Hacker Rank Solution
import java.util.Scanner;

/**
 * @author Techno-RJ
 *
 */
public class MarcsCakewalk {
	public static int[] sort(int a[]) {

		for (int i = 1; i < a.length; i++) {
			for (int j = i; j > 0; j--) {
				if (a[j] < a[j - 1]) {
					int temp = a[j - 1];
					a[j - 1] = a[j];
					a[j] = temp;
				} else
					break;
			}
		}
		return a;
	}

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		int[] calories = new int[n];
		for (int calories_i = 0; calories_i < n; calories_i++) {
			calories[calories_i] = in.nextInt();
		}
		int sortedArray[] = sort(calories);
		int j = 0;
		long sum = 0;
		for (int i = sortedArray.length - 1; i >= 0; i--) {
			sum = (sum + sortedArray[i] * (long) Math.pow(2, j++));
		}
		System.out.println(sum);
		in.close();
	}
}

33 thoughts on “Marc’s Cakewalk in Algorithm | HackerRank Programming Solutions | HackerRank Problem Solving Solutions in Java [💯Correct]”

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