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make set of pawn locations solution in Clear category for Pawn Brotherhood by jmegner
'''
author: Jacob Egner
date: 2015-06-27 (update on 2015-07-29)
island: home
puzzle URLs:
http://www.checkio.org/mission/pawn-brotherhood/
https://github.com/Bryukh-Checkio-Tasks/checkio-mission-pawn-brotherhood
for latest versions of my solutions, see my checkio solution github repo:
https://github.com/jmegner/CheckioPuzzles
'''
def safe_pawns(pawnLocStrs):
pawnLocs = set()
for pawnLocStr in pawnLocStrs:
r = ord(pawnLocStr[1]) - ord('1')
c = ord(pawnLocStr[0]) - ord('a')
pawnLocs.add((r, c))
numSafePawns = 0
for r, c in pawnLocs:
if (r - 1, c - 1) in pawnLocs or (r - 1, c + 1) in pawnLocs:
numSafePawns += 1
return numSafePawns
if __name__ == '__main__':
assert safe_pawns({"b4", "d4", "f4", "c3", "e3", "g5", "d2"}) == 6
assert safe_pawns({"b4", "c4", "d4", "e4", "f4", "g4", "e5"}) == 1
July 29, 2015
