Solution: Merge Sorted Array
Explore the optimized technique to merge two sorted arrays by using pointers to traverse from the end. Learn to place elements in order without extra space, ensuring an efficient merge with linear time complexity and constant space usage.
Statement
You are given two integer arrays, nums1 and nums2, both sorted in non-decreasing order. You are also given two integers, m and n, representing the number of elements in nums1 and nums2, respectively.
Your task is to merge the elements of nums2 into nums1 so that nums1 becomes a single array sorted in non-decreasing order.
The merged result is stored in nums1, which has a total length of m + n. The first m positions contain the initial elements, the last n positions are placeholders (initialized to 0), and nums2 contains the n elements to merge.
Constraints:
nums1.length