add adfly javascript to site

Twenty Eleven Child WordPress 3.5.2
I want to add the below script to Twenty Eleven Child but not sure where to put it

This is the example from there website:
If you have a website with 100’s or 1000’s of links you want to change over to adf.ly then please use the script below.

Simply copy-and-paste the code below on to your webpage or blog and the links will be updated automatically – simple!

You can add or remove any domains for the code that you use or your website.
<script type=”text/javascript”>
var adfly_id = 3437128;
var adfly_advert = ‘int’;
var domains = [‘depositfiles.com’, ‘rapidshare.com’, ‘vip-file.com’, ‘smsfiles.ru’, ‘4files.net’, ‘turbobit.ru’, ‘uploading.com’, ‘letitbit.net’, ‘depositfiles.ru’, ‘sms4file.com’, ‘ifolder.ru’, ‘hotfile.com’, ‘anyfiles.net’, ‘sharingmatrix.com’, ‘megashare.com’, ‘megaupload.com’, ‘rapidshare.de’, ‘rapidshare.ru’, ‘uploadbox.com’, ‘filefactory.com’, ‘filefactory.ru’, ‘filepost.ru’, ‘onefile.net’, ‘freefolder.net’, ‘getthebit.com’, ‘turbobit.net’];
</script>
<script src=”http://cdn.adf.ly/js/link-converter.js”></script&gt;

Thanks for help.