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Clean And Simple solution in Clear category for Pawn Brotherhood by bityon
from itertools import chain
def safe_pawns(pawns):
safe_places = list(chain.from_iterable((chr(ord(p[0]) - 1) + str(int(p[1]) + 1),
chr(ord(p[0]) + 1) + str(int(p[1]) + 1)) for p in pawns))
return len((set.intersection(pawns, safe_places)))
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
Nov. 28, 2015
