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all relations drone solution in Clear category for How to Find Friends by grishindg
def check_connection(con, fn, sn):
connections = set()
drons = {fn}
s = 's'
while s != connections:
s = connections.copy()
for i in drons:
connections.update({j for j in con if i in j})
for i in connections:
drons.update(set(i.split('-')))
for i in connections:
if sn in i: return True
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."
Dec. 12, 2014