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# Largest Series Product Given a string of digits, calculate the largest product for a contiguous substring of digits of length n. For example, for the input `'1027839564'`, the largest product for a series of 3 digits is 270 (9 * 5 * 6), and the largest product for a series of 5 digits is 7560 (7 * 8 * 3 * 9 * 5). Note that these series are only required to occupy *adjacent positions* in the input; the digits need not be *numerically consecutive*. For the input `'73167176531330624919225119674426574742355349194934'`, the largest product for a series of 6 digits is 23520. ## Getting Started For installation and learning resources, refer to the [exercism help page](http://exercism.io/languages/haskell). ## Running the tests To run the test suite, execute the following command: ```bash stack test ``` #### If you get an error message like this... ``` No .cabal file found in directory ``` You are probably running an old stack version and need to upgrade it. #### Otherwise, if you get an error message like this... ``` No compiler found, expected minor version match with... Try running "stack setup" to install the correct GHC... ``` Just do as it says and it will download and install the correct compiler version: ```bash stack setup ``` ## Running *GHCi* If you want to play with your solution in GHCi, just run the command: ```bash stack ghci ``` ## Feedback, Issues, Pull Requests The [exercism/haskell](https://github.com/exercism/haskell) repository on GitHub is the home for all of the Haskell exercises. If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue. We'll do our best to help you! ## Source A variation on Problem 8 at Project Euler [http://projecteuler.net/problem=8](http://projecteuler.net/problem=8) ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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