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First solution in Speedy category for Pawn Brotherhood by sergeyklimov-creator
def safe_pawns(pawns: set) -> int:
is_safe_left = lambda foo: chr(ord(foo[0])-1) + chr(ord(foo[1])-1) in pawns
is_safe_right = lambda foo: chr(ord(foo[0])+1) + chr(ord(foo[1])-1) in pawns
return sum([is_safe_left(pawn) or is_safe_right(pawn) for pawn in pawns])
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
print (safe_pawns(["a1","b2","c3","d4","e5","f6","g7","h8"]))
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. 14, 2020
