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First solution in Uncategorized category for How to Find Friends by ArkadiuszFrankowiak
def check_connection(network, first, second):
d = dict()
for i in network:
p1, p2 = i.split('-')
d.setdefault(p1, []).append(p2)
d.setdefault(p2, []).append(p1)
opn = [first]
cls = []
while len(opn):
now = opn.pop()
cls.append(now)
if now == second:
return True
for next in d.setdefault(now, []):
if next not in cls and next not in opn:
opn.append(next)
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."
Jan. 24, 2016
