#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<vvl> vvvl;
typedef vector<vvvl> vvvvl;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef vector<vvb> vvvb;
typedef vector<vvvb> vvvvb;
typedef pair<ll,ll> pl;
typedef pair<ll,pl> ppl;
typedef pair<ll,ppl> pppl;
typedef pair<ll,pppl> pppppl;
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--)
#define all(a) begin(a),end(a)
#define F first
#define S second
const ll mod=998244353;
const string als="abcdefghijklmnopqrstuvwxyz";
const string ALS="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main(){
	int n;
	cin>>n;
	ll a=0;
	rep(i,0,n){
		string s;
		cin>>s;
		int x=n;
		rep(i,0,2*n){
			if(s[i]=='#'){
				a=a+x;
			}
			else{
				x=x-1;
			}
		}
	}
	cout<<a<<endl;
}