REVERSE!REVERSE!REVERSE!

形式汇总：

7. Reverse Integer :120-21

189. Rotate Array:with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4].

原文：http://www.cnblogs.com/immiao0319/p/7909816.html