#include <bits/stdc++.h>

#define fastio                        \
    ios_base::sync_with_stdio(false); \
    cin.tie(NULL)

#define endl "\n"
#define ll long long

using namespace std;

int main()
{
    fastio;
    
    ll n, a, b; cin >> n;

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            char c; cin >> c;
            if (c == '#') a++;
            else if (c == '.') b++;
        }
    }

    if (n % 2 == 0) {
        if (a % 2 == 0 && b % 2 == 0) {
            cout << "Yes" << endl;
        } else {
            cout << "No" << endl;
        }
    } else {
        if ((a % 2 == 0 || b % 2 == 0) && (!(a % 2 == 0 && b % 2 == 0))) {
            cout << "Yes" << endl;
        } else {
            cout << "No" << endl;
        }
    }

    return 0;
}