<?php
function getCombinedSum($digits, $sum)
{
if(!is_int($digits) || !is_int($sum) || $digits<1 || $sum<0)
{
throw new InvalidArgumentException('Invalid numeric format');
}
if($sum>9*$digits)
{
throw new LogicException('Sum out of range');
}
if($digits==1)
{
return [$sum=>$sum];
}
$result = [];
for($digit=0; $digit<10 && $sum-$digit>0; $digit++)
{
foreach(getCombinedSum($digits-1, $sum-$digit) as $subsum)
{
$result[$digit.$subsum] = $digit.$subsum;
$result[$subsum.$digit] = $subsum.$digit;
}
}
return $result;
}
var_dump(getCombinedSum(3, 2));
- Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- array(6) {
["002"]=>
string(3) "002"
["020"]=>
string(3) "020"
[200]=>
string(3) "200"
["011"]=>
string(3) "011"
[110]=>
string(3) "110"
[101]=>
string(3) "101"
}
- Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/lbjQR on line 15
Process exited with code 255. - Output for 5.0.0 - 5.0.5
- Parse error: parse error, unexpected '[' in /in/lbjQR on line 15
Process exited with code 255. - Output for 4.4.2 - 4.4.9
- Parse error: syntax error, unexpected T_NEW in /in/lbjQR on line 7
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
- Parse error: parse error, unexpected T_NEW in /in/lbjQR on line 7
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/lbjQR on line 7
Process exited with code 255.
preferences:
263.76 ms | 401 KiB | 398 Q