n = int(input())
matrix = []

for _ in range(n):
    matrix.append(list(input()))

for y in range(n):
    for x in range(n):
        if matrix[y][x] == '-':
            matrix[y][x] = 'o'
            matrix[x][y] = 'x'

rank = []
for m in matrix:
    rank.append(m.count('o'))

r = rank[0]
rank_s = set(rank)
rank_t = list(rank_s)
rank_u = sorted(rank_t, reverse=True)
print(rank_u.index(r) + 1)