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- #include <iostream>
- #include <vector>
- #include <queue>
- 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];
- }
- }
- bool visited[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++) {
- visited[i][j] = false;
- if(mat[i][j] == 'S') {
- si = i;
- sj = j;
- }
- }
- }
- queue<int> q;
- q.push(si);
- q.push(sj);
- q.push(0);
- visited[si][sj] = true;
- while(!q.empty()) {
- int ci = q.front(); // momentalno i od poleto
- q.pop();
- int cj = q.front(); // momentalno j od poleto
- q.pop();
- int dist = q.front();
- q.pop();
- cout << ci + 1 << " " << cj + 1 << " " << dist << endl;
- if(mat[ci][cj] == 'E') {
- cout << dist << endl;
- break;
- }
- // siri se site negovi sosedi
- if(ci + 1 < n and mat[ci + 1][cj] != '#' and !visited[ci + 1][cj]) {
- visited[ci + 1][cj] = true;
- q.push(ci + 1);
- q.push(cj);
- q.push(dist + 1);
- }
- if(ci - 1 >= 0 and mat[ci - 1][cj] != '#' and !visited[ci - 1][cj]) {
- visited[ci - 1][cj] = true;
- q.push(ci - 1);
- q.push(cj);
- q.push(dist + 1);
- }
- if(cj + 1 < m and mat[ci][cj + 1] != '#' and !visited[ci][cj + 1]) {
- visited[ci][cj + 1] = true;
- q.push(ci);
- q.push(cj + 1);
- q.push(dist + 1);
- }
- if(cj - 1 >= 0 and mat[ci][cj - 1] != '#' and !visited[ci][cj - 1]) {
- visited[ci][cj - 1] = true;
- q.push(ci);
- q.push(cj - 1);
- q.push(dist + 1);
- }
- }
- 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
- **/
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