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Third solution in Clear category for Pawn Brotherhood by intspt
def safe_pawns(pawns):
s = [(int(cor[1]), ord(cor[0]) - ord('a') + 1) for cor in pawns]
ans = 0
for (r, c) in s:
if ((r - 1, c - 1) in s) or ((r - 1, c + 1) in s):
ans += 1
return ans
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. 17, 2014
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