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First solution in Clear category for Pawn Brotherhood by anuj74
import string
def safe_pawns(pawns):
col_indx=string.ascii_lowercase
pawns_indexes = set()
for p in pawns:
row = int(p[1]) - 1
col = col_indx.index(p[0])
pawns_indexes.add((row, col))
count=0
for row,col in pawns_indexes:
is_left_safe=(row-1,col-1) in pawns_indexes
is_right_safe=(row-1,col+1) in pawns_indexes
if is_left_safe or is_right_safe:
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
June 22, 2015
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