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  1. <?php
  2. $n=10;
  3. $count = 0;
  4.  for ($i= 1; $i<=$n; $i++)
  5.       for ($j=$i+1; $j<=$n; $j++)
  6.            for ($k=$i+1; $k<=$j; $k++)
  7.                 $count ++;
  8.                 echo $count;
  9.                 ?>
Success #stdin #stdout 0.02s 23708KB
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stdin 
Standard input is empty
stdout 
165
https://ideone.com/Ewlci0
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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