1.4 KiB
Alphametics
Write a function to solve alphametics puzzles.
Alphametics is a puzzle where letters in words are replaced with numbers.
For example SEND + MORE = MONEY:
S E N D
M O R E +
-----------
M O N E Y
Replacing these with valid numbers gives:
9 5 6 7
1 0 8 5 +
-----------
1 0 6 5 2
This is correct because every letter is replaced by a different number and the words, translated into numbers, then make a valid sum.
Each letter must represent a different digit, and the leading digit of a multi-digit number must not be zero.
Write a function to solve alphametics puzzles.
For installation and learning resources, refer to the exercism help page.
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.
Run the tests from the exercise directory using the following command:
ruby alphametics_test.rb
To include color from the command line:
ruby -r minitest/pride alphametics_test.rb
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.