#include <bits/stdc++.h>

using i64 = long long;
using u64 = unsigned long long;
using u32 = unsigned;
using u128 = unsigned __int128;

constexpr int dx[] = {1, 0, -1, 0};
constexpr int dy[] = {0, 1, 0, -1};

bool check(int n, auto &&s) {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (std::isdigit(s[i][j])) {
                int c = 0;
                for (int k = 0; k < 4; k++) {
                    int x = i + dx[k];
                    int y = j + dy[k];
                    if (0 <= x && x < n && 0 <= y && y < n && s[x][y] == '?') {
                        c++;
                    }
                }
                if (c != s[i][j] - '0') {
                    return false;
                }
            } else if (s[i][j] == '.' || s[i][j] == '?') {
                int c = 0;
                for (int x = i - 1; x >= 0; x--) {
                    if (s[x][j] != '.') {
                        c += s[x][j] == '?';
                        break;
                    }
                }
                for (int x = i + 1; x < n; x++) {
                    if (s[x][j] != '.') {
                        c += s[x][j] == '?';
                        break;
                    }
                }
                for (int y = j - 1; y >= 0; y--) {
                    if (s[i][y] != '.') {
                        c += s[i][y] == '?';
                        break;
                    }
                }
                for (int y = j + 1; y < n; y++) {
                    if (s[i][y] != '.') {
                        c += s[i][y] == '?';
                        break;
                    }
                }
                if ((c == 0) != (s[i][j] == '?')) {
                    return false;
                }
            }
        }
    }
    return true;
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int n;
    std::cin >> n;
    
    std::vector<std::string> s(n);
    for (int i = 0; i < n; i++) {
        std::cin >> s[i];
    }
    
    if (check(n, s)) {
        std::cout << "1\n";
    } else {
        std::cout << "0\n";
    }
    
    return 0;
}