30 lines
450 B
PHP
30 lines
450 B
PHP
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#!/usr/bin/env php
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<?php
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$length = 25;
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$lines = explode("\n", file_get_contents("input"));
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$valid = 0;
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for($i=$length; $i<count($lines); $i++) {
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$ival = $lines[$i];
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for($x=$i-$length; $x<$i; $x++) {
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$xval = $lines[$x];
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for($y=$i-$length; $y<$x; $y++) {
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$yval = $lines[$y];
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if(($xval + $yval) == $ival) {
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$valid = $i;
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}
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}
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}
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if($valid != $i)
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break;
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}
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echo "First number with bad property is {$lines[$valid + 1]}\n";
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?>
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