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

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n; cin >> n;
  vector<string> s(n);
  for(auto &&e: s) cin >> e;
  int z = 0;
  vector<pair<int, int>> l, r;
  for(int i = 0; i < n; ++i){
    for(int j = 0; j < n; ++j){
      if(s[i][j] == '#') l.emplace_back(make_pair(i, j));
    }
  }
  for(int i = 0; i < n; ++i){
    for(int j = n; j < n*2; ++j){
      if(s[i][j] == '.') r.emplace_back(make_pair(i, j));
    }
  }
  int lx = 0, ly = 0, rx = 0, ry = 0;
  for(auto[x, y]: l){
    lx += x;
    ly += y;
  }
  for(auto[x, y]: r){
    rx += x;
    ry += y;
  }
  //cout << lx << " : " << ly << " : " << rx << " : " << ry << '\n';
  z = (rx - lx) + (ry - ly);
  cout << z << '\n';
  return 0;
}