摘要： 整理思路：前边的大于等于后边的 VI II 后边的大于前边的 IV (这种按一个位数走)function romanChangeNum($roman) { $array = ['I' => 1, 'V' => 5, 'X' => 10, 'L' => 50, 'C' => 100, 'D' => 5 阅读全文

摘要： $num = 123455678;$b = strrev($num);$array = str_split($num);$array = array_reverse($array);var_dump($array); 阅读全文

摘要： $array = [2,5,7,9,11];$target = 11;function twoSums($array, $target) { $count = count($array); for ($i=0;$i<$count;$i++) { $diff = $target - $array[$i 阅读全文