Restructuring

solutions/ProjectEuler/024/solve.php

@@ -0,0 +1,26 @@
+<?php
+define('NUM_PERMUTATION',1000000);
+define('DIGITS',9);
+$target = NUM_PERMUTATION - 1;
+
+$digits = range(0, 9);
+$permus = array(1 => 1);
+for ($i = 2; $i <= 9; $i++) {
+        $permus[$i] = $permus[$i - 1] * $i;
+}
+$permus = array_reverse($permus);
+$values = array();
+
+foreach ($permus as $n) {
+        $values[] = floor($target / $n);
+        $target = $target%$n;
+}
+
+$result = "";
+foreach ($values as $val) {
+        $result .= $digits[$val];
+        unset($digits[$val]);
+        sort($digits);
+}
+$result .= $digits[0];
+echo $result;