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First solution in Clear category for Pawn Brotherhood by dominieq
def safe_pawns(pawns):
pawns_indexes = set()
for i in pawns:
a = int(i[1])-1
b = ord(i[0])-97
pawns_indexes.add((a, b))
count = 0
for i, j in pawns_indexes:
if ((i-1, j-1) in pawns_indexes) or ((i-1, j+1) in pawns_indexes):
count = count+1
return count
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. 21, 2016