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First solution in Clear category for Pawn Brotherhood by PawelMartyniuk
def safe_pawns(pawns):
n = 0
abc = 'abcdefghijk'
safe = 0
while (n < len(pawns)):
elem = pawns.pop()
pawns.add(elem)
guard = abc[abc.index(elem[0])-1] + str(int(elem[1])-1)
guard2 = abc[abc.index(elem[0])+1] + str(int(elem[1])-1)
if (guard in pawns) or (guard2 in pawns):
safe +=1
n += 1
return safe
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. 24, 2016
