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

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  ll n; cin >> n;
  vector<string> s(n);
  for(auto &&e: s) cin >> e;
  ll z, G = n*n*(n+1)/2, y = 0, t = 0, v = 0;
  for(ll i = 0; i < n; ++i){
    for(ll j = 0; j < n*2; ++j){
      if(s[i][j] == '.') {
        y += (j+1);
        ++v;
      }
    }
    if(i != n-1)t += abs(v - ((i+1)*n));
  }
  z = y - G;
  z += t;
  cout << z << '\n';
  return 0;
}