Maximum Perimeter Triangle Hackerrank Solution - java

 Maximum Perimeter Triangle 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 'maximumPerimeterTriangle' function below.

     *

     * The function is expected to return an INTEGER_ARRAY.

     * The function accepts INTEGER_ARRAY sticks as parameter.

     */

    public static List<Integer> maximumPerimeterTriangle(List<Integer> sticks) {

        Collections.sort(sticks);

        ArrayList<Integer> al = new ArrayList<>();

        int i = sticks.size()-3;

        while(i>=0){

            if(sticks.get(i)+sticks.get(i+1)>sticks.get(i+2)){

                break;

            }else{

                i = i - 1;

            }

        }

        if(i<0){

            al.add(-1);

        }else{

            al.add(sticks.get(i));

            al.add(sticks.get(i+1));

            al.add(sticks.get(i+2));

        }

        return al;

    }

}

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> sticks = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))

            .map(Integer::parseInt)

            .collect(toList());

        List<Integer> result = Result.maximumPerimeterTriangle(sticks);

        bufferedWriter.write(

            result.stream()

                .map(Object::toString)

                .collect(joining(" "))

            + "\n"

        );

        bufferedReader.close();

        bufferedWriter.close();

    }

}