oj.uz

Submission #439934

# Submission time Handle Problem Language Result Execution time Memory
439934 2021-07-01T08:42:52 Z elazarkoren Awesome Arrowland Adventure (eJOI19_adventure) C++17
100 / 100
 151 ms 21192 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#define chkmin(a, b) a = min(a, b)
#define x first
#define y second
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef vector<bool> vb;
typedef vector<vb> vvb;

const int infinity = 1e9;

//int ans = infinity;

int dir_x[] = {-1, 0, 1, 0};
int dir_y[] = {0, 1, 0, -1};
int n, m;

//void Dfs(vvi &graph, int x, int y, vvb &visited, int count) {
//    if (x < 0 || x >= n || y < 0 || y >= m) return;
//    if (visited[x][y]) return;
//    if (x == n - 1 && y == m - 1) {
//        chkmin(ans, count);
//        return;
//    }
//    if (graph[x][y] == 4) return;
//    visited[x][y] = true;
//    for (int i = 0; i < 4; i++) {
//        Dfs(graph, x + dir_x[graph[x][y]], y + dir_y[graph[x][y]], visited, count + i);
//        graph[x][y]++;
//        graph[x][y] %= 4;
//    }
//    visited[x][y] = false;
//}

inline int Val(int i, int j) {
    return i + n * j;
}

vector<vii> graph;
int Dijkstra() {
    vi distances(n * m, infinity);
    vb visited(n * m);
    distances[0] = 0;
    priority_queue<pii, vii, greater<pii>> pq;
    pq.push({0, 0});
    while (!pq.empty()) {
        int node = pq.top().y, d = pq.top().x;
        pq.pop();
        if (visited[node]) continue;
        visited[node] = true;
        for (pii neighbor : graph[node]) {
            if (distances[neighbor.x] > neighbor.y + d) {
                distances[neighbor.x] = neighbor.y + d;
                pq.push({neighbor.y + d, neighbor.x});
            }
        }
    }
    return distances[n * m - 1];
}

int main() {
    cin >> n >> m;
    graph.resize(n * m);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            char c;
            cin >> c;
            int curr = 0;
            if (c == 'X') {
                curr = 4;
            } else if (c == 'S') {
                curr = 2;
            } else if (c == 'W') {
                curr = 3;
            } else if (c == 'E') {
                curr = 1;
            }
            int node = Val(i, j);
            if (curr != 4) {
                for (int k = 0; k < 4; k++) {
                    i += dir_x[k], j += dir_y[k];
                    if (0 <= i && i < n && 0 <= j && j < m) {
                        graph[node].push_back({Val(i, j), (k - curr + 4) % 4});
                    }
                    i -= dir_x[k], j -= dir_y[k];
                }
            }
        }
    }
//    vvb visited(n, vb(m));
//    Dfs(graph, 0, 0, visited, 0);
    int ans = Dijkstra();
    cout << (ans == infinity ? -1 : ans);
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 296 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #5
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 296 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 296 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 9 ms 1796 KB Output is correct
36 Correct 1 ms 420 KB Output is correct
37 Correct 11 ms 1972 KB Output is correct
38 Correct 10 ms 2908 KB Output is correct
39 Correct 106 ms 16804 KB Output is correct
40 Correct 107 ms 16836 KB Output is correct
41 Correct 58 ms 16684 KB Output is correct
42 Correct 108 ms 16780 KB Output is correct
43 Correct 151 ms 21192 KB Output is correct
44 Correct 66 ms 16708 KB Output is correct