Enable Javascript in your browser and then refresh this page, for a much enhanced experience.
First solution in Clear category for What Is Wrong With This Family? by flpo
from collections import defaultdict
def is_family(pairs):
childs = defaultdict(set)
for f, c in pairs:
if f == c or f in childs[c] or any(c in childs[x] for x in childs):
return False
if any({f, c} in p for p in childs.values()):
return False
childs[f].add(c)
return len([p for p in childs if all(p not in s for s in childs.values())]) == 1
if __name__ == "__main__":
#These "asserts" using only for self-checking and not necessary for auto-testing
assert is_family([
['Logan', 'Mike']
]) == True, 'One father, one son'
assert is_family([
['Logan', 'Mike'],
['Logan', 'Jack']
]) == True, 'Two sons'
assert is_family([
['Logan', 'Mike'],
['Logan', 'Jack'],
['Mike', 'Alexander']
]) == True, 'Grandfather'
assert is_family([
['Logan', 'Mike'],
['Logan', 'Jack'],
['Mike', 'Logan']
]) == False, 'Can you be a father for your father?'
assert is_family([
['Logan', 'Mike'],
['Logan', 'Jack'],
['Mike', 'Jack']
]) == False, 'Can you be a father for your brather?'
assert is_family([
['Logan', 'William'],
['Logan', 'Jack'],
['Mike', 'Alexander']
]) == False, 'Looks like Mike is stranger in Logan\'s family'
print("Looks like you know everything. It is time for 'Check'!")
April 15, 2017
