Solved ProjectEuler/014: php, ruby, c

2012-03-08 16:41:12 +01:00
parent 53aa74bfb8
commit a57849a661
4 changed files with 92 additions and 0 deletions
--- a/ProjectEuler/014/solve.php
+++ b/ProjectEuler/014/solve.php
@ -0,0 +1,13 @@
+<?php
+$max_steps = 0;
+for($test=999999;$test>1;$test--) {
+$ctest = $test;
+$steps = 1;
+	while($ctest != 1) {
+		$ctest = ($ctest % 2) ? $ctest*3+1 : $ctest/2;
+		$steps++;
+	}
+
+	if($steps > $max_steps) { $max_start = $test; $max_steps = $steps;}
+}
+echo $max_start;