#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
	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 (i == 0) {win_num[i]++; s[i][j] = 'o'; s[j][i] = 'x';}
				else {
					if (win_num[i] < win_num[j]) {
						win_num[i]++; s[i][j] = 'o'; s[j][i] = 'x';
					}
					else {
						win_num[j]++; s[i][j] = 'x'; s[j][i] = 'o';
					}
				}
			}
		}
	}
	int win_0 = win_num[0],temp = 999;
	sort(win_num.begin(), win_num.end());
	for (int i = N - 1; i >= 0;i--) {
		if (win_num[i] < temp) {
			if (temp != 999) { ans++; }
		}
		if (win_num[i] == win_0) { cout << ans << endl; return 0; }
		temp = win_num[i];
	}
	return 0;
}