#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif

int main()
{
    int64_t n;
    cin >> n;
    vector<string> ss(n);
    for (auto &&s : ss)
    {
        cin >> s;
    }

    int64_t cnt = 0;
    for (auto &&s : ss)
    {
        for (auto &&c : s)
        {
            if (c == '#')
            {
                cnt++;
            }
        }
    }

    if (n % 2 == 0)
    {
        cout << ((2 * cnt == n * n) ? "Yes" : "No") << endl;
    }
    else
    {
        cout << ((2 * cnt == n * (n - 1)) ? "Yes" : "No") << endl;
    }

    return 0;
}