LeetCode is a great platform for people who want general coding practice, whether that be for interviews or just wanting to practice their problem solving. I will be taking you through all the steps of finding the optimal solution to each problem on the site following a logical ordering setout by LeetCode themselves.
In this video, we are going over the problem 88. Merge Sorted Arrays where the goal of the problem is to take the two arrays and compare their values one by one to determine where to place them back into the original nums1 array.
We can use our knowledge of the problem to make an O(n) solution that allows us to edit the nums1 array in place. Going back to the description of the problem, they tried to make it very clear that the arrays were sorted for us with the smallest numbers first and the largest numbers last. Similarly to how to compared which numbers were smaller, we could also go backwards through the arrays checking which number is larger, this would allow us to keep track of the order without the need of a temporary array.
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