Merge Sorted Array

Problem

Given two sorted integer arrays A and B, merge B into A as one sorted array.

Note:
You may assume that A has enough space (size that is greater or equal to m + n) to hold additional elements from B. The number of elements initialized in A and B are m and n respectively.

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Idea

从A的m+n-1开始分配，A,B也分别指向最高位，把大的放到A里

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Note

访问数组的优先级高于++

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Solution

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