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First solution in Clear category for How to Find Friends by kv.polyanskiy
def check_connection(network, first, second):
for edge in filter((lambda x: first in x), network):
edge = list(edge.split('-'))
if {first, second} == set(edge):
return True
else:
if type(network) != list:
network = list(network)
network.remove('-'.join(edge))
edge.remove(first)
return check_connection(network, edge[0], second)
return False
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert check_connection(
("dr101-mr99", "mr99-out00", "dr101-out00", "scout1-scout2",
"scout3-scout1", "scout1-scout4", "scout4-sscout", "sscout-super"),
"scout2", "scout3") == True, "Scout Brotherhood"
assert check_connection(
("dr101-mr99", "mr99-out00", "dr101-out00", "scout1-scout2",
"scout3-scout1", "scout1-scout4", "scout4-sscout", "sscout-super"),
"super", "scout2") == True, "Super Scout"
assert check_connection(
("dr101-mr99", "mr99-out00", "dr101-out00", "scout1-scout2",
"scout3-scout1", "scout1-scout4", "scout4-sscout", "sscout-super"),
"dr101", "sscout") == False, "I don't know any scouts."
April 25, 2015
