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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 m andn respectively.

 

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 Array Two Pointers
 
class Solution {public:    void merge(int A[], int m, int B[], int n) {        int k=m+n-1;        int i=m-1;        int j=n-1;        while(i>=0 && j>=0){            if(A[i]<B[j])                A[k--]=B[j--];            else                A[k--]=A[i--];        }        while(i>=0)            A[k--]=A[i--];        while(j>=0)            A[k--]=B[j--];    }};

 

Merge Sorted Array