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I can't understand the rational behind the solution. How did you derive the result (2^a[i] + 1) and then multiply all the solutions and not add them. I have been trying to wrap my head around this, but not able to get it. Would be great if someone can explain me how they thought about this problem.
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Shashank and List
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I can't understand the rational behind the solution. How did you derive the result (2^a[i] + 1) and then multiply all the solutions and not add them. I have been trying to wrap my head around this, but not able to get it. Would be great if someone can explain me how they thought about this problem.