09. Kamino Factory

<?php
$dnaLength = readline();

$bestDNA = [
  'sample' => 0,
  'index' => 'none',
  'length' => 0,
  'dna' => '',
  'sum' => 0
];

$sample = 0;

while (true) {
  $input = readline();


  if ($input === 'Clone them!') {
      echo 'Best DNA sample ' . $bestDNA['sample'] . ' with sum: ' . $bestDNA['sum'] . '.' . PHP_EOL;
      echo $bestDNA['dna'] ;
      break;
  }

  $sample++;

  $dna = str_replace("!", "", $input);

  if (intval($dnaLength) === strlen($dna)) {
      $sum = array_sum(explode('!', $input));

      $dna = str_replace("0", " 0 ", $dna);
      $printDNA = trim(str_replace("!", " ", $input));
      $dna = trim(str_replace("  ", " ", $dna));
      $dna = explode(' ', $dna);

      $length = 0;
      $index = '';
      for ($i = 0; $i < count($dna); $i++) {
          if ($dna[$i] > 1) {
              if ($length < strlen($dna[$i])) {
                  $length = strlen($dna[$i]);
                  $index = strlen(implode("", array_slice($dna, 0, $i)));
              }
          }
      }
      $addToBestDNA = false;
      if ($bestDNA['index'] === 'none') {
          $addToBestDNA = true;
      } elseif ($bestDNA['length'] < $length) {
          $addToBestDNA = true;
      } elseif ($bestDNA['length'] === $length && $bestDNA['index'] > $index) {
          $addToBestDNA = true;
      } elseif ($bestDNA['length'] === $length && $bestDNA['index'] === $index && $bestDNA['sum'] < $sum) {
          $addToBestDNA = true;
      }

      if ($addToBestDNA) {
          $bestDNA['sample'] = $sample;
          $bestDNA['index'] = $index;
          $bestDNA['length'] = $length;
          $bestDNA['dna'] = $printDNA;
          $bestDNA['sum'] = $sum;
      }
  }
}