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

signed main(){
  int N; cin >> N;
  vector< string > G( N );
  for( int i = 0; i < N; ++i )
    cin >> G[ i ];
  vector< int > win( N );
  for( int i = 0; i < N; ++i ){
    if( G[ 0 ][ i ] == '-' )
      G[ 0 ][ i ] = 'o',
      G[ i ][ 0 ] = 'x';
    if( G[ 0 ][ i ] == 'o' )
      ++win[ 0 ];
  }
  for( int i = 1; i < N; ++i )
    for( int j = 0; j < N; ++j )
      if( G[ i ][ j ] == 'o' )
        ++win[ i ];
  for( int i = 1; i < N; ++i )
    for( int j = i + 1; j < N; ++j )
      if( G[ i ][ j ] == '-' ){
        if( win[ i ] != win[ j ] )
          G[ i ][ j ] = 'o',
          G[ j ][ i ] = 'x',
          ++win[ i ];
        else
          G[ j ][ i ] = 'o',
          G[ i ][ j ] = 'x',
          ++win[ j ];
      }
  int zcnt = win[ 0 ];
  sort( win.begin(), win.end(), greater< int >() );
  for( int i = 0, c = 0; i < N; ++i ){
    if( i - 1 >= 0 and win[ i ] != win[ i - 1 ] )
      ++c;
    if( zcnt == win[ i ] )
      cout << c + 1 << endl, exit( 0 );
  }
  return 0;
}