For merging two sorted lists of sizes m and n into a sorted list of size m +…

To merge two sorted lists of sizes m and n, we use a two-pointer technique where each element is compared at most once. Step 1: Initialize two pointers, one for each list, starting at the first element. Step 2: Compare the elements at the current pointers and select the smaller one to add to the merged list. Step 3: Move the pointer of the list from which the element was selected. Step 4: Repeat until all elements from both lists are processed. Since each element is compared at most once, the total number of comparisons is at most m + n. Therefore, the time complexity of merging is O(m + n).