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Who can protect me ? solution in Clear category for Pawn Brotherhood by caldeius
def safe_pawns(pawns: set) -> int:
def behind_left(pawn):
if pawn[0] == 'a' or pawn[1] == 1:
return None
else:
return chr(ord(pawn[0]) - 1) + str(int(pawn[1]) - 1)
def behind_right(pawn):
if pawn[0] == 'h' or pawn[1] == 1:
return None
else:
return chr(ord(pawn[0]) + 1) + str(int(pawn[1]) - 1)
protected = [(behind_left(pawn) in pawns or behind_right(pawn) in pawns) for pawn in pawns]
return sum(protected)
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
print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")
Jan. 21, 2020