Hacker Rank Problem Solved Practice Solution 1 - 4

1. Solve Me First

<?php

function solveMeFirst($a,$b){
  // Hint: Type return $a + $b; below 
 
}

$handle = fopen ("php://stdin","r");
$_a = fgets($handle);
$_b = fgets($handle);
$sum = (int)$_a+(int)$_b;
print ($sum);
fclose($handle);
?>




2. Simple Array Sum (PHP)

<?php

/*
 * Complete the simpleArraySum function below.
 */
function simpleArraySum($ar) {
    /*
     * Write your code here.
     */
         $len=count($ar);
        $sum=0;
        for($i=0;$i<$len;$i++){
            $sum+=$ar[$i]; // sum=sum+ar[i];
        }
        return $sum;

}

$fptr = fopen(getenv("OUTPUT_PATH"), "w");

$stdin = fopen("php://stdin", "r");

fscanf($stdin, "%d\n", $ar_count);

fscanf($stdin, "%[^\n]", $ar_temp);

$ar = array_map('intval', preg_split('/ /', $ar_temp, -1, PREG_SPLIT_NO_EMPTY));

$result = simpleArraySum($ar);

fwrite($fptr, $result . "\n");

fclose($stdin);
fclose($fptr);

3. Compare the Triplets (java 7)


import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    // Complete the compareTriplets function below.
    static List<Integer> compareTriplets(List<Integer> a, List<Integer> b) {

    int aliceTotalScore = 0, bobTotalScore = 0;
    for(int i=0; i<3; i++){
        int aliceScore = a.get(i);
        int bobScore = b.get(i);
        if(aliceScore != bobScore){
        int temp = aliceScore > bobScore ? aliceTotalScore++ : bobTotalScore++;
        }
    }
    List<Integer> result = new ArrayList<>();
    result.add(aliceTotalScore);
    result.add(bobTotalScore);
    return result;

    }

    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")));

        String[] aItems = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

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

        for (int i = 0; i < 3; i++) {
            int aItem = Integer.parseInt(aItems[i]);
            a.add(aItem);
        }

        String[] bItems = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

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

        for (int i = 0; i < 3; i++) {
            int bItem = Integer.parseInt(bItems[i]);
            b.add(bItem);
        }

        List<Integer> result = compareTriplets(a, b);

        for (int i = 0; i < result.size(); i++) {
            bufferedWriter.write(String.valueOf(result.get(i)));

            if (i != result.size() - 1) {
                bufferedWriter.write(" ");
            }
        }

        bufferedWriter.newLine();

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




4. A Very Big Sum (PHP)

<?php

// Complete the aVeryBigSum function below.
function aVeryBigSum($ar) {

        $len=count($ar);
        $sum=0;
        for($i=0;$i<$len;$i++){
            $sum+=$ar[$i]; // sum=sum+ar[i];
        }
        return $sum;
}

$fptr = fopen(getenv("OUTPUT_PATH"), "w");

$stdin = fopen("php://stdin", "r");

fscanf($stdin, "%d\n", $ar_count);

fscanf($stdin, "%[^\n]", $ar_temp);

$ar = array_map('intval', preg_split('/ /', $ar_temp, -1, PREG_SPLIT_NO_EMPTY));

$result = aVeryBigSum($ar);

fwrite($fptr, $result . "\n");

fclose($stdin);
fclose($fptr);