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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. * * * * For installation and learning resources, refer to the [exercism help page](http://exercism.io/languages/ruby). For running the tests provided, you will need the Minitest gem. Open a terminal window and run the following command to install minitest: gem install minitest If you would like color output, you can `require 'minitest/pride'` in the test file, or note the alternative instruction, below, for running the test file. In order to run the test, you can run the test file from the exercise directory. For example, if the test suite is called `hello_world_test.rb`, you can run the following command: ruby hello_world_test.rb To include color from the command line: ruby -r minitest/pride hello_world_test.rb ## 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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102 entries across 102 versions & 1 rubygems