solution for https://www.hackerrank.com/challenges/the-birthday-bar/

the-birthday-bar.php

<?php

// Complete the birthday function below.
function birthday($s, $d, $m) {
    $tot = 0;
    for($i=0;$i<=sizeof($s)-1;$i++){
        $cnt=1;$sum=$s[$i];$ok=0;
        for($j=$i+1;$j<=sizeof($s)-1;$j++)
        {
            $cnt++;
            if ($cnt<=$m && !$ok){
                $sum+=$s[$j];
                if ($sum==$d && $cnt==$m){
                    $ok=1;
                    $tot++;
                }
            }
        }
        if ($sum==$d && $cnt==$m && !$ok){
            $tot++;
        }
    }
    //echo "[$tot]\n";
    return $tot;
}

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

$n = intval(trim(fgets(STDIN)));

$s_temp = rtrim(fgets(STDIN));

$s = array_map('intval', preg_split('/ /', $s_temp, -1, PREG_SPLIT_NO_EMPTY));

$dm = explode(' ', rtrim(fgets(STDIN)));

$d = intval($dm[0]);

$m = intval($dm[1]);

$result = birthday($s, $d, $m);

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

fclose($fptr);