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@ 2015-09-16T11:40:30Z

<?php

$n = 0;
$heights = array();
$n = readline();
for($i = 1; $i<=$n; $i++)
{
  $line = readline();
  $data = explode($line, " ");
  $heights[$i]['g'] = $data[0];
  $heights[$i]['h'] = $data[1]; 
  $heights[$i]['o'] = $i;
}

asort($heights['h']);

for($i= 1; $i<=$n; $i++)
	echo $heights[$i]['o'];

Output
Performance
VLD
References
Branches

asort: documentation ( source)
explode: documentation ( source)

preferences:dark modelive preview

51.33 ms | 402 KiB | 5 Q