CCCPaste

Untitled

#include 
#include 
#include 
using namespace std;
typedef long long  ll;

int main() {
    ios_base::sync_with_stdio(false);
    int n, m;
    cin >> n >> m;
    char mat[n][m];
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            cin >> mat[i][j];
        }
    }
    int dist[n][m];
    int si = -1, sj = -1; // redot na S, kolonata na S
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            dist[i][j] = -1;
            if(mat[i][j] == 'S') {
                si = i;
                sj = j;
            }
        }
    }
    int di[] = {-1, 1, 0, 0};
    int dj[] = {0,  0, -1,1};
    queue q;
    q.push(si);
    q.push(sj);
    dist[si][sj] = 0;
    while(!q.empty()) {
        int ci = q.front(); // momentalno i od poleto
        q.pop();
        int cj = q.front(); // momentalno j od poleto
        q.pop();
        for(int i = 0; i < 4; i++) {
            int ti = ci + di[i];
            int tj = cj + dj[i];
            if(ti < 0 or tj < 0 or ti >= n or tj >= m) continue;
            if(mat[ti][tj] == '#') continue;
            if(dist[ti][tj] != -1) continue;
            q.push(ti);
            q.push(tj);
            dist[ti][tj] = dist[ci][cj] + 1;
        }
    }
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            cout << i + 1 <<  " " << j + 1 << " " << dist[i][j] << endl;
        }
    }
    return 0;
}
/*
#####
..S..
..#..
 E....
#####
 visited[n][m]
 Queue: (1, 2, 0)
 visited[1][2] = true;
 
 (1, 2) --> (1, 3); (1, 1)
 
 Queue: (1, 3, 1), (1, 1, 1)
 visited[1][3] = true
 visited[1][1] = true
 
 (1, 3) --> (1, 4); (2, 3)
 
 Queue: (1, 1, 1); (1, 4, 2); (2, 3, 2)
 visited[1][4] = true;
 visited[2][3] = true;
 
 (1, 1) --> (1, 0); (2, 1)
 
 Queue: (1, 4, 2); (2, 3, 2); (1, 0, 2); (2, 1, 2)
 visited[1][0] = true;
 visited[2][1] = true;
 
 (1, 4) --> (2, 4, 3)
 
 Queue: (2, 3, 2); (1, 0, 2); (2, 1, 2); (2, 4, 3)
 visited[2][4] = true;
 
 (2, 3) --> (3, 3, 3)
 
 Queue: (1, 0, 2); (2, 1, 2); (2, 4, 3): (3, 3, 3)
 visited[3][3] = true;
 
 QueueL (2, 1, 2); (2, 4, 3); (3, 3, 3)
 (2, 1) --> (2, 0, 3); (3, 1, 3)
 
 Queue: (2, 4, 3); (3, 3, 3); (2, 0, 3); (3, 1, 3)
 visited[2][0] = true;
 visited[3][1]

 (2, 4) --> (3, 4)
 Queue: (3, 3, 3); (2, 0, 3); (3, 1, 3); (3, 4, 4)
 visited[3][4] = true;
 
 (3, 3) --> (3, 2)
 
 QueueL (2, 0, 3); (3, 1, 3); (3, 4, 4); (3, 2, 4)
 visited[3][2] = true;
 (2, 0, 3) --> (3, 0, 4); ANSWER
 
 **/