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def possible_neighbor(pawn):
# find neighbors can suppor itself
col, row = list(pawn)
result = []
if int(row) > 1:
row = str(int(pawn[1]) - 1)
if col < 'h':
result.append(chr(ord(col) + 1) + row)
if col > 'a':
result.append(chr(ord(col) - 1) + row)
return result
def safe_pawns(pawns):
safe_counter = 0
for i in pawns:
for j in possible_neighbor(i):
if j in pawns:
safe_counter += 1
break
return safe_counter
if __name__ == '__main__': # pragma: no cover
# 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
KenMercusLai /
checkio
