We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Data Structures
  3. Arrays
  4. Array Manipulation
  5. Discussions

Array Manipulation

  • mtkocak
     + 2 comments

    Here is the PHP code of this solution. Teached me a lot. Thanks.

    <?php
$_fp = fopen("php://stdin", "r");
/* Enter your code here. Read input from STDIN. Print output to STDOUT */
fscanf($_fp, "%d %d", $size, $operations);
$array = [];

$max = PHP_INT_MIN;

for($i=0; $i<$operations; $i++){
    fscanf($_fp, "%d %d %d", $start, $end, $value);
    $negativeValue = $value * -1;
    if(!isset($array[$start])) $array[$start] = $value;
    else $array[$start] += $value;
    if($end+1<=$size){
        if(!isset($array[$end+1])) $array[$end+1] = $negativeValue;
        else $array[$end+1] -= $value;
    }
}
ksort($array);

$sum = 0;
foreach($array as $amount){
    $sum += $amount;
    if($sum>$max) $max=$sum;
}

echo $max;
?>