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First solution in Clear category for Digits Doublets by frbrgeorge
def checkio(numbers):
num = set(numbers)
path = [[numbers[0]]]
while True:
newpath = []
for seq in path:
if seq[-1] == numbers[-1]:
return seq
for n in numbers:
diff = abs(seq[-1]-n)
if (seq[-1]%10==n%10) + (seq[-1]//10%10==n//10%10) + (seq[-1]//100%10==n//100%10) == 2:
newpath.append(seq+[n])
path = newpath
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio([123, 991, 323, 321, 329, 121, 921, 125, 999]) == [123, 121, 921, 991, 999], "First"
assert checkio([111, 222, 333, 444, 555, 666, 121, 727, 127, 777]) == [111, 121, 127, 727, 777], "Second"
assert checkio([456, 455, 454, 356, 656, 654]) == [456, 454, 654], "Third, [456, 656, 654] is correct too"
July 22, 2019
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