std::ios::sync_with_stdio(false);

int n, m;

std::cin >> n >> m;

std::vector<int> prev_row(static_cast<size_t>(m));

std::vector<int> current_row(static_cast<size_t>(m));

bool all_rectangles = true;

for (int i = 0; i < n; i++) {

for (int j = 0; j < m; j++) {

std::cin >> current_row[j];

if (i > 0 && j > 0 && (current_row[j - 1] + current_row[j] + prev_row[j - 1] + prev_row[j] == 3)) {

all_rectangles = false;

break;

}

}

if (!all_rectangles)

break;

std::swap(prev_row, current_row);

}

if (all_rectangles)

std::cout << "Yes";

else

std::cout << "No";

return 0;