https://leetcode.com/problems/median-of-two-sorted-arrays/solution/
http://www.cnblogs.com/yuzhangcmu/p/4138184.html
http://blog.csdn.net/gao1440156051/article/details/51725845
http://blog.csdn.net/linhuanmars/article/details/19905515
LeetCode: Median of Two Sorted Arrays
原文：http://www.cnblogs.com/yxzfscg/p/7467532.html