#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif

#define _USE_MATH_DEFINES
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
//https://boostjp.github.io/tips/multiprec-int.html
using lll = __int128_t;

#define YES cout<<"Yes\n"
#define NO cout<<"No\n"
#define YN {cout<<"Yes\n";}else{cout<<"No\n";}// if(a==b)YN;
#define NO2 cout<<"-1\n"

#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rrep(i, n) for (int i=int(n)-1; i>=0; --i)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int N;
    cin >> N;
    vector<string> V(N);
    rep(i,N) cin >> V[i];

    ll yoko_count = 0, tate_count = 0;
    int white = 0;
    rep(i,N) {
        rep(j,2*N) {
            if (V[i][j] == '.') {
                white++;
                yoko_count += j;
            }
        }
        yoko_count -= N*(N-1)/2; //0~N-1
        tate_count += abs(white - (i+1)*N) ;
    }

    cout << yoko_count + tate_count << endl;
}