#include <iostream>
#include <iomanip>//小数点出力用
//cout << fixed << setprecision(10) << ans;
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>
using ll = long long;
using namespace std;
#define modPHash (ll)((1LL<<61)-1)
#define modP (ll)998244353
bool chkrng0idx(int pos, int sup) { return (0 <= pos && pos < sup); }
int clk4(int num) { return (num - 2) * (num % 2); }
void yn(bool tf) { cout << (tf ? "Yes\n" : "No\n"); }

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N;cin >> N;
    string A[501];
    for (int i = 0;i < N;i++) {
        cin >> A[i];
    }
    if (N % 2 == 0) {
        int c = 0;
        for (int i = 0;i < N;i++) {
            for (int j = 0;j < N;j++) {
                if (A[i][j] == '.')c++;
            }
        }
        if (c % 2 == 1) {
            cout << "No";
        }
        else {
            cout << "Yes";
        }
    }
    else {
        cout << "Yes";
    }
    return 0;
}