taxi 12 size 8

An interesting smart question: given 12 balls of the same size, only one ball has a different weight from other balls. How can we use tianyao to name it three times to find the unique ball, in addition, it is determined that the emphasis is light or not. Number the ball, 1 ~ 12. extract 1 ~ The 4th ball is a group of A, and 5 ~ The ball on the

= Imagecreatetruecolor (170,40);2. BackColor = Imagecolorallocate ($img, Mt_rand (180,255), Mt_rand (0,255), Mt_rand (180,255));3. Imaggefill ($img, 0,0, $backcolor);4. $arr = Array_merge (range (' A ', ' Z '), rang (' A ', ' Z '), Range (0,9));5. Shuffle ($arr);6. $rand _keys = Arr_rand ($arr, 4);7. $str = ";8. foreach ($rand _key as $value) {$str. = $arr [$value];}9. $span = Ceil (170/(4+1));for ($i =1; $i $strcolor = Imagecolorallocate ($img, Mt_r

. Don't work for money, but let the money work for you;5. blindly follow the trend, and the cloud is everywhere. People do what I do;6. Xiaofu is safe, not enterprising, and is always happy;7. admit errors rather than conceal them;8. be down-to-earth, rather than thinking about it;9. too ambitious, not confident;10. Repeated job hopping is not advisable;11. Easy-to-use. Chapter 2: 12-minute effort

. If it is a Boolean value, True and False return 0 and 1 respectively;3. If NULL, returns 0;3. If it is undefined, return nan;　　4. If it is a string: Only the numbers will be converted to decimal, the containing valid floating-point numbers will be converted to floating-point values, the containing valid hexadecimal format will be converted to decimal integers of the same size, the empty string will be converted to 0, and characters other than the ab

From:http://www.cnblogs.com/gildor/archive/2010/12/13/1904060.htmlHttpWebRequest occurs when writing to UTF-8 encoding "Bytes to is written to the stream exceed the content-length Bytes size specified." ErrorThe error code is as follows:Request. ContentLength = Encoding.UTF8.GetByteCount (content); var writer = new StreamWriter (Request. GetRequestStream (), Enco