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Leetcode:Merge Sorted Array
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 mand n respectively.
分析:本题的难点在于是将排序的结果放在数组A中,解决方法是按descending的顺序从后往前遍历A和B。代码如下:
class Solution {public: void merge(int A[], int m, int B[], int n) { int lasta = m-1, lastb = n-1, cur = m+n-1; while(lasta >= 0 && lastb >= 0){ A[cur--] = (A[lasta] >= B[lastb])?A[lasta--]:B[lastb--]; } while(lastb >= 0){ A[cur--] = B[lastb--]; } }};
Leetcode:Merge Sorted Array
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