Merge Sorted Arrays Lab

Easy
4
46.5% Acceptance

In this lab, you will be working on merging two integer arrays, nums1 and nums2, which are sorted in non-decreasing order. The goal is to merge them into a single combined array, sorted in a non-decreasing order, and store it inside the array nums1. The input arrays are represented by nums1, nums2, and their respective element counts m and n.

The array nums1 has a length of m + n, with the first m elements being the initial elements that need to be merged and the last n elements being set to 0 and ignored. The array nums2 has a length of n.

Examples

Example 1

Input: nums1 = [1,2,3,0,0,0], m = 3, nums2 = [2,5,6], n = 3 Output: [1,2,2,3,5,6] Explanation: The arrays we are merging are [1,2,3] and [2,5,6]. The result of the merge is [1,2,2,3,5,6].

Example 2

Input: nums1 = [1], m = 1, nums2 = [], n = 0 Output: [1] Explanation: The arrays we are merging are [1] and []. The result of the merge is [1].

Example 3

Input: nums1 = [0], m = 0, nums2 = [1], n = 1 Output: [1] Explanation: The arrays we are merging are [] and [1]. The result of the merge is [1]. Note that because m = 0, there are no elements in nums1. The 0 is only there to ensure the merge result can fit in nums1.

Constraints

  • nums1.length == m + n
  • nums2.length == n
  • 0 <= m, n <= 200
  • 1 <= m + n <= 200
  • -109 <= nums1[i], nums2[j] <= 109

Follow-up

Can you come up with an algorithm that runs in O(m + n) time?