Given an array of integers representing the differences between consecutive elements in a reconstructed array, determine the original array that these differences represent, assuming the first element is 0 and differences alternate between being added and subtracted from the running total. The length of the output array is equal to the length of the input array plus one.
Explanation: Step-by-step: Given the input array [1, -2, 3, -4], we initialize the output array with the first element as 0. Then, we iterate over the input array. For each element, we add it to the running total if the index is even and subtract it if the index is odd. This gives us the output array [0, 1, -2, 3, -4].
Explanation: Step-by-step: Given the input array [5, -10], we initialize the output array with the first element as 0. Then, we iterate over the input array. For each element, we add it to the running total if the index is even and subtract it if the index is odd. This gives us the output array [0, 5, -10].
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