this is a test! haha~
1/13/2016
  Just reopen it for my leetcode'code storage.(ps. So far, just use java.)
1/14/2016
  Today, learned how to create an branch.
4/8/2016
  Long time without git, feel uncomfortable. Strat to update git everyday. Test how long can I insist. ^_^
8/5/2016
  I should be shame about myself, Just keep it up!
8/9/2016
  Add class PAT_1003 and StringSortedLexicographically.