Merge Sorted Array

Merge Sorted Array two pointers

Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.

Note: You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2. The number of elements initialized in nums1 and nums2 are m and n respectively.

Merge Sorted Array Solution

public class MergeSortedArray {
    public void merge(int[] A, int m, int[] B, int n) {
        int i = m - 1;
        int j = n - 1;
        int k = m + n - 1;

        while(i >= 0 && j >= 0) {
            A[k--] = A[i] > B[j] ? A[i--] : B[j--];
        }

        while(j >= 0) {
            A[k--] = B[j--];
        }
    }
}

Last modified October 4, 2020