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];
        }
    }
    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 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
 
 **/