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Why I got timed out with the same code ...
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9E9 is
9 * 10 ** 9
For this specified problem, it means a effectively large number, in order to ignore the first sum from the beginning of the input
Could also be
-float('inf')
but this one is shorter and enough for all test caseswhat is "-9E9" means,Can somebody tell me ?
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How can a year have 15 months???
I like your code.