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  1. <?php
  2. $matrix = array(
  3. 	array(3, 12, 5, 2),
  4. 	array(3, 14, 16, 12),
  5. 	array(1, 19, 10, 14)
  6. );
  7. $maxL = array();  // максимальные значения в строках
  8. $lineCnt = count($matrix[0]); // кол-во значений в строке
  9. $tmpMin = array(); // временный массив для "разворота"  матрицы на 90°
  10. foreach($matrix as $indx => $line){
  11. 	$max = max($line);
  12. 	$maxL[$indx][array_search($max, $line)] =  $max;
  13. 	for($i = 0; $i < $lineCnt; $i++){
  14. 		$tmpMin[$i][$indx] = $matrix[$indx][$i];
  15. 	}
  16. }
  17. $minC = array(); // минимальные значения в колонках
  18. foreach($tmpMin as $indx => $line){
  19. 	$min = min($line);
  20. 	$minC[$indx][array_search($min, $line)] =  $min;
  21. }
  22. $sp = array(); // массив где будут выведены седловые точки или "no", где они не найдены
  23. for($i = 0; $i < count($matrix); $i++){
  24. 	for($k = 0; $k < $lineCnt; $k++){
  25. 		if(isset($maxL[$i][$k],$minC[$k][$i])){
  26. 			$sp[$i][$k] =  $maxL[$i][$k];
  27. 		} else {
  28. 			$sp[$i][$k] =  'no';
  29. 		}
  30. 	}
  31. }
  32. print_r($sp);
Success #stdin #stdout 0.01s 20520KB
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Array
(
    [0] => Array
        (
            [0] => no
            [1] => 12
            [2] => no
            [3] => no
        )

    [1] => Array
        (
            [0] => no
            [1] => no
            [2] => no
            [3] => no
        )

    [2] => Array
        (
            [0] => no
            [1] => no
            [2] => no
            [3] => no
        )

)
https://ideone.com/dLtEXV
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
secret

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