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/*

Author: Andy, nkuwjg@gmail.com

Date: Jan 7, 2015

Problem: Merge Sorted Array

Difficulty: Easy

Source: https://oj.leetcode.com/problems/merge-sorted-array/

Notes:

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 to hold additional elements from B.

The number of elements initialized in A and B are m and n respectively.

Solution: From back to forth.

*/

public class Solution {

public void merge(int A[], int m, int B[], int n) {

int i = m - 1;

int j = n - 1;

int x = m + n - 1;

while (i >= 0 && j >= 0)

if (A[i] >= B[j]) A[x--] = A[i--];

else A[x--] = B[j--];

while (j >= 0) A[x--] = B[j--];

}

}