Michael always knew that there was something wrong with his family. Many strangers were introduced to him as part of it.
Michael should figure this out. He's spent almost a month parsing the family archives. He has all father-son connections of his entire family collected in one place.
With all that data Michael can easily understand who the strangers are. Or maybe the only stranger in this family is Michael? Let's see.
You have a list of family ties between father and son. Each element on this list has two elements. The first is the father's name, the second is the son's name. All names in the family are unique. Check if the family tree is correct. There are no strangers in the family tree. All connections in the family are natural.
Input: A list of lists. Each element has two strings. The list has at least one element
Output: Bool. Is the family tree correct.
Example:
assert is_family([["Logan", "Mike"]]) == True assert is_family([["Logan", "Mike"], ["Logan", "Jack"]]) == True assert is_family([["Logan", "Mike"], ["Logan", "Jack"], ["Mike", "Alexander"]]) == True assert is_family([["Logan", "Mike"], ["Logan", "Jack"], ["Mike", "Logan"]]) == False
Precondition: 1 <= len(tree) < 100
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
checkio sync
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium
Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.
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