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First solution in Clear category for Pawn Brotherhood by kendriu
def safe_pawns(pawns):
savior = lambda p, sign: '%s%s' % (chr(ord(p[0]) + sign), int(p[1]) - 1)
return len([1 for p in pawns if savior(p, 1) in pawns or savior(p, -1) in pawns])
return 0
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert safe_pawns({"b4", "d4", "f4", "c3", "e3", "g5", "d2"}) == 6
assert safe_pawns({"b4", "c4", "d4", "e4", "f4", "g4", "e5"}) == 1
Aug. 30, 2014
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