N = int(raw_input())
S = [[i,list(raw_input())] for i in range(N)]
for i in range(N):
	if S[0][1][i] == '-':
		S[0][1][i],S[i][1][0] = 'o','x'
S = sorted(S,cmp=lambda x,y:cmp(x[1].count('-') + x[1].count('o'),y[1].count('x') + y[1].count('o')))
for i in range(N):
	for j in range(N):
		if S[i][1][j] == '-':
			S[i][1][j],S[j][1][i] = 'o','x'
S = sorted(S,cmp=lambda x,y:cmp(x[1].count('o'),y[1].count('o')),reverse=True)
rank = 1
prev = S[0][1].count('o')
for i in range(1,N):
	if prev > S[i][1].count('o'):
		rank += 1
		prev = S[i][1].count('o')
	if S[i][0] == 0:
		print rank
		break