Marc's Cakewalk Hackerrank Solution - Java | Hackerrank Algorithms

 Marc's Cakewalk Hackerrank Solution - Java 

For Explanation watch video :

Code :

import java.io.*;

import java.math.*;

import java.security.*;

import java.text.*;

import java.util.*;

import java.util.concurrent.*;

import java.util.function.*;

import java.util.regex.*;

import java.util.stream.*;

import static java.util.stream.Collectors.joining;

import static java.util.stream.Collectors.toList;

class Result {

    /*

     * Complete the 'marcsCakewalk' function below.

     *

     * The function is expected to return a LONG_INTEGER.

     * The function accepts INTEGER_ARRAY calorie as parameter.

     */

    public static long marcsCakewalk(List<Integer> calorie) {

      

        Collections.sort(calorie,Collections.reverseOrder());

        long min_miles = 0;

        for(int i=0;i<calorie.size();i++){

            min_miles = min_miles + ((long)Math.pow(2,i)*calorie.get(i));

        }

        return min_miles;

    }

}

public class Solution {

    public static void main(String[] args) throws IOException {

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int n = Integer.parseInt(bufferedReader.readLine().trim());

        List<Integer> calorie = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))

            .map(Integer::parseInt)

            .collect(toList());

        long result = Result.marcsCakewalk(calorie);

        bufferedWriter.write(String.valueOf(result));

        bufferedWriter.newLine();

        bufferedReader.close();

        bufferedWriter.close();

    }

}