#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
	cin.tie(0); ios::sync_with_stdio(false);
	int N,ans = 1; cin >> N;
	vector<string> s(N);
	vector<int> win_num(N, 0);
	for (int i = 0; i < N;i++) {
		cin >> s[i];
		for (int j = 0; j < N;j++) {
			if (i == j) { continue; }
			if (s[i][j] == 'o') { win_num[i]++; }
		}
	}
	for (int i = 0; i < N;i++) {
		for (int j = 0; j < N;j++) {
			if (i == j) { continue; }
			if (s[i][j] == '-') {
				if (win_num[i] < win_num[j] || i == 0) { win_num[i]++; s[j][i] = 'x'; }
				else { win_num[j]++; s[j][i] = 'o'; }
			}
		}
	}
	sort(win_num.begin(), win_num.end());
	int win_0 = win_num[0],temp = win_num[N-1],count = 0;
	for (int i = N - 1; i >= 0;i--) {
		if (win_num[i] < temp) { ans++; count = 0; }
		else { count++; }
		if (count == N - 2 && win_num[1] - win_num[0] == 1&&N%2 == 0) {
			cout << 2 << endl; return 0;
		}
		if (win_num[i] == win_0) { cout << ans << endl; return 0; }
		temp = win_num[i];
	}
	return 0;
}