{"id":252,"title":"\u5c06\u4e00\u4e2a\u6570\u7684\u548c\u5206\u89e3\u4e3a\u7531\u54ea\u4e9b\u6570\u5b57\u76f8\u52a0","good":0,"bad":0,"hit":1534,"created_at":"2017-01-05 14:52:17","content":"<p>\u6700\u8fd1\u7531\u4e8e\u5de5\u4f5c\u9700\u8981\uff0c\u6709\u4e00\u4e2a\u5c5e\u6027\u662f\u75311\uff0c2\uff0c4\uff0c8\u8fd9\u79cd\u89c4\u5f8b\u7684\u6570\u5b57\u76f8\u52a0\u7684\u548c\u5b58\u50a8\u7684\uff0c\u73b0\u5728\u9700\u8981\u89e3\u5f00\u4ed6\u662f\u7531\u54ea\u4e9b\u6570\u5b57\u76f8\u52a0\u7684\uff1b<br\/><\/p><p>function sumReduction($v){<br\/> &nbsp; &nbsp;$size_all=(string)(decbin($v));\/\/\u5341\u8fdb\u5236\u8f6c\u4e8c\u8fdb\u5236<br\/> &nbsp; &nbsp;$size_all=strrev($size_all);\/\/\u7ffb\u8f6c\u5b57\u7b26\u4e32<br\/> &nbsp; &nbsp;$l=strlen($size_all);\/\/\u5b57\u7b26\u4e32\u957f\u5ea6<br\/>&nbsp;&nbsp; $arr=array();<br\/> &nbsp; &nbsp;for($i=0;$i&lt;$l;$i++){<br\/> &nbsp; &nbsp; &nbsp; &nbsp;$d=(int)substr($size_all,$i,1);\/\/\u5e95<br\/>&nbsp; &nbsp; &nbsp;&nbsp; $m=pow(2,$i);\/\/\u5e55<br\/>&nbsp; &nbsp; &nbsp;&nbsp; if($d&gt;0){<br\/> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;array_push($arr,$m);<br\/> &nbsp; &nbsp; &nbsp; &nbsp;}<br\/> &nbsp; &nbsp;}<br\/> &nbsp; &nbsp;return $arr;<br\/>}<\/p><p><br\/><\/p><p>\u6bd4\u5982\uff1a7=1+2+4<br\/><\/p>"}