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Great approach! Just a quick comment. You can take differences of left and right terms as you import each row. This computes a cumulative difference. There is no need to compute the sums first and then take differences. It's a bit simpler and, hopefully, faster ;)
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Diagonal Difference
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Great approach! Just a quick comment. You can take differences of left and right terms as you import each row. This computes a cumulative difference. There is no need to compute the sums first and then take differences. It's a bit simpler and, hopefully, faster ;)