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Submission #1111266

# Submission time Handle Problem Language Result Execution time Memory
1111266 2024-11-11T23:56:33 Z huantran Autobus (COCI22_autobus) C++17
70 / 70
 355 ms 114920 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long int;
const int maxn = 75;
const int oo = 1e9 + 7;
const ll inf = 1e18;
using pii = pair<int, int>;
using piii = pair<int, pair<int, int>>; // {distance, {vertex, road}}

int n, m, k, q, line = 0;
vector<pii> adj[maxn];
int mat[maxn][maxn];
int dis[maxn][maxn][maxn*maxn];
priority_queue<piii, vector<piii>, greater<piii>> pq;

void dijkstra(int u) {
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= line; j++)
            dis[u][i][j] = oo;
    }

    dis[u][u][0] = 0;
    pq.push({0, {u, 0}});

    while (!pq.empty()) {
        piii t = pq.top();
        int ver = t.second.first;
        int road =  t.second.second;
        int d = t.first;
        pq.pop();

        if (dis[u][ver][road] != d || road >= n)
            continue;
        
        for (auto [v, j] : adj[ver]) {
            if (dis[u][v][road + 1] > dis[u][ver][road] + j) {
                dis[u][v][road + 1] = dis[u][ver][road] + j;
                pq.push({dis[u][v][road + 1], {v, road + 1}});
            }
        }
    }
       
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);

    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++)
            mat[i][j] = oo;
    }

    for (int i = 1; i <= m; i++) {
        int u, v, c;
        cin >> u >> v >> c;
        mat[u][v] = min(mat[u][v], c);
    }

    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            if (mat[i][j] != oo) {
                adj[i].push_back({j, mat[i][j]});
                // adj[j].push_back({i, mat[i][j]});
                line++;
            }
        }
    }

    cin >> k >> q;
    for (int i = 1; i <= n; i++) {
        dijkstra(i);
    }

    for (int i = 1; i <= q; i++) {
        int a, b;
        cin >> a >> b;
        int res = oo;
        for (int j = 0; j <= min(k, n); j++)
            res = min(res, dis[a][b][j]);
        
        if (res == oo)
            cout << -1 << '\n';
        else
            cout << res << '\n';
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 1 ms 476 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 29036 KB Output is correct
2 Correct 81 ms 29000 KB Output is correct
3 Correct 87 ms 29372 KB Output is correct
4 Correct 132 ms 41032 KB Output is correct
5 Correct 123 ms 41032 KB Output is correct
6 Correct 221 ms 83448 KB Output is correct
7 Correct 226 ms 83472 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 1 ms 476 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 82 ms 29244 KB Output is correct
8 Correct 81 ms 29256 KB Output is correct
9 Correct 127 ms 41124 KB Output is correct
10 Correct 126 ms 41040 KB Output is correct
11 Correct 213 ms 83468 KB Output is correct
12 Correct 234 ms 83472 KB Output is correct
13 Correct 344 ms 114692 KB Output is correct
14 Correct 335 ms 114696 KB Output is correct
15 Correct 329 ms 114700 KB Output is correct
16 Correct 336 ms 114696 KB Output is correct
17 Correct 273 ms 114712 KB Output is correct
18 Correct 301 ms 114648 KB Output is correct
19 Correct 282 ms 114760 KB Output is correct
20 Correct 278 ms 114760 KB Output is correct
21 Correct 296 ms 114760 KB Output is correct
22 Correct 273 ms 114768 KB Output is correct
23 Correct 287 ms 114760 KB Output is correct
24 Correct 273 ms 114700 KB Output is correct
25 Correct 311 ms 114776 KB Output is correct
26 Correct 323 ms 114816 KB Output is correct
27 Correct 320 ms 114800 KB Output is correct
28 Correct 303 ms 114760 KB Output is correct
29 Correct 338 ms 114764 KB Output is correct
30 Correct 331 ms 114764 KB Output is correct
31 Correct 335 ms 114728 KB Output is correct
32 Correct 327 ms 114764 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 1 ms 476 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 85 ms 29036 KB Output is correct
8 Correct 81 ms 29000 KB Output is correct
9 Correct 87 ms 29372 KB Output is correct
10 Correct 132 ms 41032 KB Output is correct
11 Correct 123 ms 41032 KB Output is correct
12 Correct 221 ms 83448 KB Output is correct
13 Correct 226 ms 83472 KB Output is correct
14 Correct 82 ms 29244 KB Output is correct
15 Correct 81 ms 29256 KB Output is correct
16 Correct 127 ms 41124 KB Output is correct
17 Correct 126 ms 41040 KB Output is correct
18 Correct 213 ms 83468 KB Output is correct
19 Correct 234 ms 83472 KB Output is correct
20 Correct 344 ms 114692 KB Output is correct
21 Correct 335 ms 114696 KB Output is correct
22 Correct 329 ms 114700 KB Output is correct
23 Correct 336 ms 114696 KB Output is correct
24 Correct 273 ms 114712 KB Output is correct
25 Correct 301 ms 114648 KB Output is correct
26 Correct 282 ms 114760 KB Output is correct
27 Correct 278 ms 114760 KB Output is correct
28 Correct 296 ms 114760 KB Output is correct
29 Correct 273 ms 114768 KB Output is correct
30 Correct 287 ms 114760 KB Output is correct
31 Correct 273 ms 114700 KB Output is correct
32 Correct 311 ms 114776 KB Output is correct
33 Correct 323 ms 114816 KB Output is correct
34 Correct 320 ms 114800 KB Output is correct
35 Correct 303 ms 114760 KB Output is correct
36 Correct 338 ms 114764 KB Output is correct
37 Correct 331 ms 114764 KB Output is correct
38 Correct 335 ms 114728 KB Output is correct
39 Correct 327 ms 114764 KB Output is correct
40 Correct 74 ms 29252 KB Output is correct
41 Correct 79 ms 29256 KB Output is correct
42 Correct 134 ms 41040 KB Output is correct
43 Correct 131 ms 41032 KB Output is correct
44 Correct 225 ms 83192 KB Output is correct
45 Correct 232 ms 83204 KB Output is correct
46 Correct 317 ms 114692 KB Output is correct
47 Correct 318 ms 114828 KB Output is correct
48 Correct 329 ms 114696 KB Output is correct
49 Correct 318 ms 114696 KB Output is correct
50 Correct 278 ms 114776 KB Output is correct
51 Correct 292 ms 114760 KB Output is correct
52 Correct 272 ms 114644 KB Output is correct
53 Correct 275 ms 114820 KB Output is correct
54 Correct 276 ms 114760 KB Output is correct
55 Correct 288 ms 114760 KB Output is correct
56 Correct 274 ms 114776 KB Output is correct
57 Correct 294 ms 114760 KB Output is correct
58 Correct 335 ms 114776 KB Output is correct
59 Correct 345 ms 114772 KB Output is correct
60 Correct 345 ms 114920 KB Output is correct
61 Correct 334 ms 114764 KB Output is correct
62 Correct 332 ms 114716 KB Output is correct
63 Correct 328 ms 114764 KB Output is correct
64 Correct 336 ms 114708 KB Output is correct
65 Correct 355 ms 114764 KB Output is correct