Untitled

#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;
const int maxn = 1050;
char mat[maxn][maxn];
int main() {
    ios_base::sync_with_stdio(false);
    int n, m, k;
    cin >> n >> m >> k;
    int si, sj, ei, ej;
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            cin >> mat[i][j];
            if(mat[i][j] == 'M') {
                si = i;
                sj = j;
            }
            if(mat[i][j] == 'V') {
                ei = i;
                ej = j;
            }
        }
    }
    mat[si][sj] = '.';
    mat[ei][ej] = '.';
    int di[] = {-1, 1, 0, 0};
    int dj[] = {0, 0, -1, 1};
     
    vector > visited(n + 1, vector (m + 1, false));
    visited[si][sj] = true;
    queue q;
    q.push(si);
    q.push(sj);
    vector > points_from_walls;
    while(!q.empty()) {
        int ci = q.front(); q.pop();
        int cj = q.front(); q.pop();
        if(ci == ei and cj == ej) {
            cout << "DA" << endl;
            return 0;
        }
        for(int i = 0; i < 4; i++) {
            int ti = ci + di[i];
            int tj = cj + dj[i];
            if(ti >= 0 and ti < n and tj >= 0 and tj < m and !visited[ti][tj]) {
                if(mat[ti][tj] == '#') {
                    points_from_walls.push_back(make_pair(ci, cj));
                }
                else {
                    visited[ti][tj] = true;
                    q.push(ti);
                    q.push(tj);
                }
            }
        }
    }
    vector > dist(n + 1, vector(m + 1, -1));
 
    for(pair x : points_from_walls) {
        q.push(x.first);
        q.push(x.second);
        dist[x.first][x.second] = 0;
    }
     
    dist[si][sj] = 0;
    while(!q.empty()) {
        int ci = q.front(); q.pop();
        int cj = q.front(); q.pop();
         
        for(int i = 0; i < 4; i++) {
            int ti = ci + di[i];
            int tj = cj + dj[i];
            if(ti >= 0 and ti < n and tj >= 0 and tj < m and dist[ti][tj] == -1) {
                dist[ti][tj] = dist[ci][cj] + 1;
                q.push(ti);
                q.push(tj);
            }
        }
         
    }
    q.push(ei);
    q.push(ej);
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            visited[i][j] = false;
        }
    }
    visited[ei][ej] = true;
    while(!q.empty()) {
        int ci = q.front(); q.pop();
        int cj = q.front(); q.pop();
        if(mat[ci][cj] == '.' and dist[ci][cj] <= k) {
            cout << "DA" << endl;
            return 0;
        }
        for(int i = 0; i < 4; i++) {
            int ti = ci + di[i];
            int tj = cj + dj[i];
            if(ti >= 0 and ti < n and tj >= 0 and tj < m and mat[ti][tj] != '#' and !visited[ti][tj]) {
                visited[ti][tj] = true;
                q.push(ti);
                q.push(tj);
            }
        }
    }
     
    cout << "NE" << endl;
    return 0;
}