#!/usr/bin/env python3
#fileencoding: utf-8

N = int(input())
table = [list(input()) for i in range(N)]
win_count = [[0,i] for i in range(N)]

for i in range(N):
    if table[0][i] == "-":
        table[0][i] = "o"
        table[i][0] = "x"
        win_count[0][0] += 1
    elif table[0][i] == "o":
        win_count[0][0] += 1

for i in range(1,N):
    for j in range(N):
        if table[i][j] == "o":
            win_count[i][0] += 1
        elif table[i][j] == "-":
            win_count[i][0] += 1
            table[i][j] = "o"
            table[j][i] = "x"

win_count = sorted(win_count, key=lambda val:val[0])
cur_rank = 1
cur_score = win_count[0][0]
for i in range(1,N):
    if win_count[i][1] == 0:
        break
    if cur_score == win_count[i][0]:
        continue
    else:
        cur_score = win_count[i][0]
        cur_rank += 1
print(cur_rank)