Color The Code

Tuesday, December 7, 2021

2D Array DS | HackerRank | Data Structure | Arrays | Practice

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 'hourglassSum' function below.

* The function is expected to return an INTEGER.

* The function accepts 2D_INTEGER_ARRAY arr as parameter.

public static int hourglassSum(List<List<Integer>> arr) {

// Write your code here

int mx = Integer.MIN_VALUE;

for(int i =0;i<4;i++){

for(int j = 0;j<4;j++){

int sum = 0;

sum = arr.get(i).get(j) +arr.get(i).get(j+1) + arr.get(i).get(j+2)

+ arr.get(i+1).get(j+1) + arr.get(i+2).get(j) + arr.get(i+2).get(j+1)

+ arr.get(i+2).get(j+2);

if(sum > mx){

mx = sum;

}

return mx;

}

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")));

List<List<Integer>> arr = new ArrayList<>();

IntStream.range(0, 6).forEach(i -> {

try {

arr.add(

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

.map(Integer::parseInt)

.collect(toList())

);

} catch (IOException ex) {

throw new RuntimeException(ex);

}

});

int result = Result.hourglassSum(arr);

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

bufferedWriter.newLine();

bufferedReader.close();

bufferedWriter.close();

}

Friday, June 11, 2021

Arrays - DS | HackerRank | DS | Arrays | Color the Code

Arrays - DS ( HackerRank )

Solution :

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 'reverseArray' function below.
     *
     * The function is expected to return an INTEGER_ARRAY.
     * The function accepts INTEGER_ARRAY a as parameter.
     */

    public static List<Integer> reverseArray(List<Integer> a) {
    // Write your code here
        
    Collections.reverse(a);
    return a;
    }

}

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 arrCount = Integer.parseInt(bufferedReader.readLine()
        .trim());

        List<Integer> arr = Stream.of(bufferedReader.readLine()
        .replaceAll("\\s+$", "").split(" "))
        .map(Integer::parseInt)
        .collect(toList());

        List<Integer> res = Result.reverseArray(arr);

        bufferedWriter.write(
            res.stream()
                .map(Object::toString)
                .collect(joining(" "))
            + "\n"
        );

        bufferedReader.close();
        bufferedWriter.close();
    }
}