N = int(input())
s = [[x for x in input()] for _ in range(N)]

a = [i for i,x in enumerate(s[0]) if x == '-']
s[0] = [x if x != '-' else 'o' for x in s[0]]
for i in range(1,N):
    s[i][0] = s[i][0] if s[i][0] != '-' else 'x'

for i in range(1,N):
    if s[i].count('o') > s[0].count('o'):
        s[i] = [x if x != '-' else 'o' for x in s[i]]
        for j in range(N):
            s[j][i] = s[j][i] if s[j][i] != '-' else 'x'

for c in range(N):
    for i in range(1, N):
        if s[i].count('o') == c and '-' in s[i]:
            j = s[i].index('-')
            s[i][j] = 'o'
            s[j][i] = 'x'

wc0 = [x.count('o') for x in s]
for i in a:
    if wc0[0] < wc0[i] and wc0[i] + 1 in wc0:
        s[0][i] = 'x'
        s[i][0] = 'o'

wc = [x.count('o') for x in s]
on = []
ans = 1
for i in range(1, N):
    if wc[i] > wc[0] and not wc[i] in on:
        on.append(wc[i])
        ans += 1
print(ans)