Author: ACMer

Base62, like Base10 (decimal), Base16 (hexadecimal), is a number system. Base62 uses 62 possible ASCII letters, 0 – 9, a – z and A – Z, therefore it is often …

The problem is from codeforces: http://www.codeforces.com/problemset/problem/260/A This problem looks difficult at the first glance because of the input ranges are large for the given three integers. Using bruteforce to print …

During this Christmas, I registered a new domain for fun. I always wanted to have a shorter domain rather than this one, in order to bring more traffic and …

Apache Server allows URL rewrite rule by simply placing a file called .htaccess under the FTP directories. The Rewrite Rules will override its parent one if there is any. …

PHP Provides str_rot13 function to rotate alphabetic characters by 13 places. However, there is no str_rot47 function to rotate 47 places over a larger mapping table. The following is …