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  1.   <?php
  2.  
  3. error_reporting(-1);
  4. mb_internal_encoding('utf-8');
  5.  
  6. $total = 7;
  7. $step  = 3;
  8.  
  9. $citizens  = range(1, $total);
  10. $positions = array_combine($citizens, $citizens);
  11.  
  12. while (count($positions) >= $step) {
  13.  
  14.     for ($i = 1; $i < $step; $i++) {
  15.         $cur = next($positions);
  16.  
  17.         if ($cur === false) {
  18.             reset($positions);
  19.         }
  20.     }
  21.     unset($positions[$cur]);
  22.  
  23.     if (current($positions) === false) {
  24.         reset($positions);
  25.     }
  26.  
  27.     //  var_dump(current($positions));
  28.     //   print_r($positions);
  29. }
  30. echo "Выигрышные места: ";
  31. echo implode(", ", array_values($positions)) . ". \n";
  32.  
  33.  
Success #stdin #stdout 0.01s 20568KB
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  Выигрышные места: 1, 4.
https://ideone.com/5c0HD6
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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