#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<long long> VL;
typedef vector<VL> VVL;
typedef long long LL;
#define all(a) (a).begin(), (a).end()
#define Yes(n) cout << ((n) ? "Yes" : "No"  ) << endl
#define YES(n) cout << ((n) ? "YES" : "NO"  ) << endl
#define ALL(a)  (a).begin(),(a).end()
#define pb push_back

int main() {std::ios_base::sync_with_stdio(false);   std::cin.tie(NULL);
  LL n;cin>>n;
  string s;
  VI B;
  LL wa=0;
  rep(i,n){cin>>s;
    rep(j,2*n){
      if(s[j]=='#'){wa+=j+1; B.pb(i);}
    }
  }
  LL ans=n*n*(3*n+1)/2-wa;
  sort(all(B));
  //cout<<ans<<endl;
  VI A;
  rep(i,n)rep(j,n){A.pb(i);}
  rep(i,n*n){ans+=abs(A[i]-B[i]);}
  cout<<ans<<endl;
}