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First solution in Clear category for Pawn Brotherhood by kaiszi
def safe_pawns(pawns):
pawns_i=set()
for p in pawns:
row=int(p[1])-1
col=ord(p[0])-97
pawns_i.add((row, col))
count=0
for row, col in pawns_i:
is_safe=((row-1,col-1) in pawns_i) or ((row-1, col+1) in pawns_i)
if is_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
Oct. 15, 2016
