/* * * ^v^ * */ #include <iostream> #include <numeric> #include <set> #include <iomanip> #include <chrono> #include <queue> #include <string> #include <vector> #include <functional> #include <map> #include <bitset> #include <algorithm> #include <array> #include <random> using namespace std; using ll = long long int; using ld = long double; #define iamtefu ios_base::sync_with_stdio(false); cin.tie(0); #define fl(i,a,n) for (ll i{a}; i<n; i++) #define fr(x,s) for(auto x:s) #define rfl(i,a,n) for (ll i{n-1}; i>=a; i--) #define ty int _; for(cin>>_; _--;) #define print(a) for(auto ele:a){cout<<ele<<" ";}cout<<'\n'; #define all(x) x.begin(), x.end() template <typename L, typename R> inline bool chmax(L &a, R b){if (a<b){a=b;return 1;}return 0;} template <typename L, typename R> inline bool chmin(L &a, R b){if (a>b){a=b;return 1;}return 0;} template <typename L, typename R> ostream& operator<<(ostream &fout, const pair<L, R> &p){ fout<<"{"<<p.first<<","<<p.second<<"}"; return fout; } template <typename L, typename R, typename U> ostream& operator<<(ostream &fout, const tuple<L, R, U> &p){ auto &[l, r, u] = p; fout<<"{"<<l<<","<<r<<","<<u<<"}"; return fout; } template <typename L, typename R, typename U, typename T> ostream& operator<<(ostream &fout, const tuple<L, R, U, T> &p){ auto &[l, r, u, t] = p; fout<<"{"<<l<<","<<r<<","<<u<<","<<t<<"}"; return fout; } template <typename L, typename R, typename U, typename T, typename V> ostream& operator<<(ostream &fout, const tuple<L, R, U, T, V> &p){ auto &[l, r, u, t, v] = p; fout<<"{"<<l<<","<<r<<","<<u<<","<<t<<","<<v<<"}"; return fout; } template <typename T> ostream& operator<<(ostream &fout, const vector <T> &v){ for (auto &x:v){ fout<<x<<" "; } fout<<"\n"; return fout; } template <typename T> ostream& operator<<(ostream &fout, const set <T> &st){ for (auto &x:st){ fout<<x<<" "; } fout<<"\n"; return fout; } template <typename T> ostream& operator<<(ostream &fout, const multiset <T> &st){ for (auto &x:st){ fout<<x<<" "; } fout<<"\n"; return fout; } template <typename K, typename V> ostream& operator<<(ostream &fout, const map<K, V> &mp){ fout<<"["; for (auto &[x,y]:mp){ fout<<x<<":"<<y<<" "; } fout<<"]\n"; return fout; } ll gcd(ll a, ll b){ if (b==0){ return a; } return gcd(b, a%b); } mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); ll pw(ll a, ll b, ll m){ ll res=1; a%=m; while (b){ if (b&1){ res=(res*a)%m; } a=(a*a)%m; b/=2; } return res; } void scn(){ // not necessarily distinct // right down ll n; cin>>n; vector <string> a(n); fl(i,0,n){ cin>>a[i]; } ll ans = 0; fl(i,0,n){ fl(j,0,n){ ll r = 0, c = 0; fl(k,0,n){ r+=(a[i][k]=='.'); if (a[i][k]=='B'){ r = -1e9; } c+=(a[k][j]=='.'); if (a[k][j]=='B'){ c = -1e9; } } ans+=(r==1)+(c==1); } } ll heh = 0, heh1 = 0; fl(i,0,n){ heh+=(a[i][i]=='.'); if (a[i][i]=='B'){ heh = -1e9; } heh1+=(a[i][n-i-1]=='.'); if (a[i][n-i-1]=='B'){ heh1 = -1e9; } } ans/=n; ans+=(heh==1)+(heh1==1); cout<<ans<<'\n'; } int main(){ iamtefu; #if defined(airths) auto t1=chrono::high_resolution_clock::now(); freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); #endif //ty { scn(); } #if defined(airths) auto t2=chrono::high_resolution_clock::now(); ld ti=chrono::duration_cast<chrono::nanoseconds>(t2-t1).count(); ti*=1e-6; cerr<<"Time: "<<setprecision(12)<<ti; cerr<<"ms\n"; #endif return 0; }