#include <bits/stdc++.h>
using namespace std;

#define int long long
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
}*/

signed main()
{
  int n;
  cin >> n;
  
  string s[n];
  rep(i, n) cin >> s[i];
    
  vi win(n), game(n); 
  rep(i, n){
    rep(j, n){
      if(i == j) continue;
      if(s[i][j] == 'o') win[i]++;
      if(s[i][j] == '-') game[i]++;
    }
  }

  vi v(n);
  rep(i, n){
    v[i] = win[i];
  }
  v[0] += game[0];

  sort(all(v));
  reverse(all(v));
 
  int ans = 1;
  rep(i, v.size()){
    if(v[i] == win[0]+game[0]) break;
    ans++;
  }

  cout << ans << endl;

  return 0;
}