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Well, Haskell's built-in read :: String -> Double is quite slow, so I write my own version of reader. After many times of submission I found that the input format does not follow what it should be:
The input r is written with at most 6 decimal digits behind the decimal point.
It confused me for a whole day, and later I just tried to read 8 decimal digits behind the decimal point and that was accepted.
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Project Euler #127: abc-hits
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Well, Haskell's built-in
read :: String -> Doubleis quite slow, so I write my own version of reader. After many times of submission I found that the input format does not follow what it should be:The input r is written with at most 6 decimal digits behind the decimal point.
It confused me for a whole day, and later I just tried to read 8 decimal digits behind the decimal point and that was accepted.