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  1. <?php
  2.  
  3. function getValueBills($num)
  4. {
  5.     $arr = [
  6.     5000=>0,
  7.     1000=>0,
  8.     500=>0,
  9.     100=>0];
  10.     $x=0;
  11.     while(true){
  12.         if($num <= 0 || $x>10000){
  13.             break;
  14.         }
  15.         $x++;
  16.         foreach($arr as $ri => $rv){
  17.           $s = $num / $ri;
  18.            if(is_int($s)){
  19.                $num -= $ri;
  20.                $arr[$ri] += 1;
  21.                break;
  22.             }
  23.         }
  24.     }    
  25.     return $arr;
  26. }
  27.  
  28. function getBillsValue($bills){
  29.     $rvalue = 0;
  30.     foreach($bills as $item => $value){
  31.         $rvalue += $item * $value;
  32.     }
  33.     return $rvalue;
  34. }
  35.  
  36. $value = 17700;
  37. var_dump($value);
  38. $bills = getValueBills($value);
  39. $value = getBillsValue($bills);
  40. var_dump($bills, $value);
Success #stdin #stdout 0.01s 24404KB
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int(17700)
array(4) {
  [5000]=>
  int(3)
  [1000]=>
  int(2)
  [500]=>
  int(1)
  [100]=>
  int(2)
}
int(17700)
https://ideone.com/pEESRH
language:
PHP (php 7.3.5)
created:
3 years ago
visibility:
public

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