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  1. <?php
  2. $bills = array(
  3. 		100 => 23,
  4. 		500 => 5,
  5. 		1000 => 0,
  6. 		5000 => 200
  7. 		);
  8. $reverse = array_flip($bills);
  9. $billsSum = array(
  10. 				100 => $bills[100]*$reverse[23],
  11. 				500 => $bills[500]*$reverse[5],
  12. 				1000 => $bills[1000]*$reverse[0],
  13. 				5000 => $bills[5000]*$reverse[200]		
  14. 		);
  15. print_r($billsSum);
Success #stdin #stdout 0.01s 20520KB
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stdin
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Standard input is empty
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Array
(
    [100] => 2300
    [500] => 2500
    [1000] => 0
    [5000] => 1000000
)
https://ideone.com/Edyg6P
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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