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With sets solution in Clear category for Pawn Brotherhood by KrickMab
def safe_pawns(pawns):
xCoord = ["a", "b", "c", "d", "e", "f", "g", "h"]
setOfSafeCells = set()
for pawn in pawns:
xIndex = xCoord.index(pawn[0])
y = str(int(pawn[1]) + 1)
if (xIndex == 7):
setOfSafeCells |= {xCoord[xIndex-1] + y}
elif(xIndex == 0):
setOfSafeCells |= {xCoord[xIndex+1] + y}
else:
setOfSafeCells |= {xCoord[xIndex+1] + y, xCoord[xIndex-1] + y}
return len(pawns & setOfSafeCells)
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
Oct. 10, 2016
