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  1. <?php
  2.  
  3. $deck = array_merge(array_fill(0, 26, 'R'), array_fill(0, 26, 'B'));
  4. $games = 0;
  5. $wins = 0;
  6.  
  7. for ($games = 1; $games < 100 * 1000; $games++) {
  8.     $cur_deck = $deck;
  9.     shuffle($cur_deck);
  10.  
  11.     $reds = 26;
  12.     $blacks = 26;
  13.     $deck_size = $reds + $blacks;
  14.  
  15.     while ($deck_size >= 2) {
  16.         // Betting cases
  17.         if ($reds > $blacks) { break; }         // If more red then black, bet
  18.         if ($reds == 1) { break; }              // If only one red left, bet
  19.         if ($deck_size == 1) { break; }   // If only one card left, bet
  20.  
  21.         $flip = array_pop($cur_deck);
  22.         if ($flip == 'R') { $reds--; }
  23.         if ($flip == 'B') { $blacks--; }
  24.         $deck_size--;
  25.     }
  26.  
  27.     // If the next flip is red, we win.
  28.     $flip = array_pop($cur_deck);
  29.     if ($flip == 'R') { $wins++; }
  30. }
  31.  
  32. echo "Total Games: " . number_format($games) . PHP_EOL;
  33. echo "Total Wins:  " . number_format($wins)  . PHP_EOL;
  34. echo "Win Percent: " . number_format(100 * ($wins / $games), 2) . PHP_EOL;
  35.  
  36. ?>
Success #stdin #stdout 1.47s 20568KB
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Total Games: 100,000
Total Wins:  49,985
Win Percent: 49.99
https://ideone.com/TvXkIB
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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