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Submission #647771

# Submission time Handle Problem Language Result Execution time Memory
647771 2022-10-04T04:18:27 Z LeonaRaging Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 505 ms 11992 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define fi first
#define se second
#define ll long long
#define pb push_back
#define db(val) "[" #val " = " << (val) << "] "

const ll mod = 1e9 + 7;
const int maxn = 1e5 + 4;
const int INF = 1e10;
const int N = 205;

using T = pair<int,int>;

struct Edge {
    int u, v, w, c;
    tuple<int,int,int,int> init() {
        return {u, v, w, c};
    }
};

int n, m, d[N][N], dis[N];
Edge edges[maxn];
set<int> adj[maxn];
priority_queue<T, vector<T>, greater<T>> pq;

int dijkstra(int s, int t) {
    for (int i = 1; i <= n; i++)
        dis[i] = INF;
    dis[s] = 0; pq.push({0, s});
    while (!pq.empty()) {
        int u, d; tie(d, u) = pq.top(); pq.pop();
        if (dis[u] != d) continue;
        for (int i : adj[u]) {
            int v = edges[i].v, w = edges[i].w;
            if (dis[u] + w < dis[v]) {
                dis[v] = dis[u] + w;
                pq.push({dis[v], v});
            }
        }
    }
    return dis[t];
}

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    //freopen(".INP", "r", stdin);
    //freopen(".OUT", "w", stdout);
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= n; j++)
            if (i != j)
                d[i][j] = INF;
    for (int i = 1; i <= m; i++) {
        int u, v, w, c; cin >> u >> v >> w >> c;
        d[u][v] = min(d[u][v], w);
        edges[i] = {u, v, w, c};
        edges[i + m] = {v, u, w, c};
        adj[u].insert(i);
    }
    for (int k = 1; k <= n; k++)
        for (int u = 1; u <= n; u++)
            for (int v = 1; v <= n; v++)
                d[u][v] = min(d[u][v], d[u][k] + d[k][v]);
    int res = INF;
    int s = 1, t = n;
    res = min(res, d[s][t] + d[t][s]);
    for (int i = 1; i <= m; i++) {
        int u, v, w, c; tie(u, v, w, c) = edges[i].init();
        int from = min(d[s][t], d[s][v] + w + d[u][t]);
        int to = min(d[t][s], d[t][v] + w + d[u][s]);
        if (from + to + c < res) {
            adj[u].erase(i); adj[v].insert(i + m);
            res = min(res, c + dijkstra(s, t) + dijkstra(t, s));
            adj[v].erase(i + m); adj[u].insert(i);
        }
    }
    cout << (res == INF ? -1 : res);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5460 KB Output is correct
2 Correct 11 ms 5380 KB Output is correct
3 Correct 12 ms 5460 KB Output is correct
4 Correct 11 ms 5424 KB Output is correct
5 Correct 4 ms 5152 KB Output is correct
6 Correct 16 ms 5388 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4988 KB Output is correct
9 Correct 3 ms 5076 KB Output is correct
10 Correct 15 ms 5484 KB Output is correct
11 Correct 26 ms 5468 KB Output is correct
12 Correct 12 ms 5424 KB Output is correct
13 Correct 11 ms 5484 KB Output is correct
14 Correct 11 ms 5460 KB Output is correct
15 Correct 11 ms 5460 KB Output is correct
16 Correct 11 ms 5460 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 10812 KB Output is correct
2 Correct 46 ms 11724 KB Output is correct
3 Correct 39 ms 11892 KB Output is correct
4 Correct 12 ms 5588 KB Output is correct
5 Correct 11 ms 5460 KB Output is correct
6 Correct 11 ms 5332 KB Output is correct
7 Correct 11 ms 5332 KB Output is correct
8 Correct 3 ms 5076 KB Output is correct
9 Correct 57 ms 11964 KB Output is correct
10 Correct 53 ms 11984 KB Output is correct
11 Correct 47 ms 11956 KB Output is correct
12 Correct 39 ms 11956 KB Output is correct
13 Correct 41 ms 11944 KB Output is correct
14 Correct 42 ms 11908 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 5456 KB Output is correct
2 Correct 12 ms 5396 KB Output is correct
3 Correct 36 ms 10244 KB Output is correct
4 Correct 11 ms 5384 KB Output is correct
5 Correct 38 ms 11660 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 63 ms 11696 KB Output is correct
9 Correct 76 ms 11724 KB Output is correct
10 Correct 43 ms 11724 KB Output is correct
11 Correct 44 ms 11732 KB Output is correct
12 Correct 39 ms 11724 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5032 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 42 ms 11728 KB Output is correct
20 Correct 46 ms 11716 KB Output is correct
21 Correct 42 ms 11696 KB Output is correct
22 Correct 42 ms 11844 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5460 KB Output is correct
2 Correct 11 ms 5380 KB Output is correct
3 Correct 12 ms 5460 KB Output is correct
4 Correct 11 ms 5424 KB Output is correct
5 Correct 4 ms 5152 KB Output is correct
6 Correct 16 ms 5388 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4988 KB Output is correct
9 Correct 3 ms 5076 KB Output is correct
10 Correct 15 ms 5484 KB Output is correct
11 Correct 26 ms 5468 KB Output is correct
12 Correct 12 ms 5424 KB Output is correct
13 Correct 11 ms 5484 KB Output is correct
14 Correct 11 ms 5460 KB Output is correct
15 Correct 11 ms 5460 KB Output is correct
16 Correct 11 ms 5460 KB Output is correct
17 Correct 34 ms 10812 KB Output is correct
18 Correct 46 ms 11724 KB Output is correct
19 Correct 39 ms 11892 KB Output is correct
20 Correct 12 ms 5588 KB Output is correct
21 Correct 11 ms 5460 KB Output is correct
22 Correct 11 ms 5332 KB Output is correct
23 Correct 11 ms 5332 KB Output is correct
24 Correct 3 ms 5076 KB Output is correct
25 Correct 57 ms 11964 KB Output is correct
26 Correct 53 ms 11984 KB Output is correct
27 Correct 47 ms 11956 KB Output is correct
28 Correct 39 ms 11956 KB Output is correct
29 Correct 41 ms 11944 KB Output is correct
30 Correct 42 ms 11908 KB Output is correct
31 Correct 12 ms 5456 KB Output is correct
32 Correct 12 ms 5396 KB Output is correct
33 Correct 36 ms 10244 KB Output is correct
34 Correct 11 ms 5384 KB Output is correct
35 Correct 38 ms 11660 KB Output is correct
36 Correct 3 ms 4940 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 63 ms 11696 KB Output is correct
39 Correct 76 ms 11724 KB Output is correct
40 Correct 43 ms 11724 KB Output is correct
41 Correct 44 ms 11732 KB Output is correct
42 Correct 39 ms 11724 KB Output is correct
43 Correct 3 ms 4948 KB Output is correct
44 Correct 3 ms 4948 KB Output is correct
45 Correct 3 ms 4948 KB Output is correct
46 Correct 3 ms 5032 KB Output is correct
47 Correct 3 ms 4948 KB Output is correct
48 Correct 3 ms 4948 KB Output is correct
49 Correct 42 ms 11728 KB Output is correct
50 Correct 46 ms 11716 KB Output is correct
51 Correct 42 ms 11696 KB Output is correct
52 Correct 42 ms 11844 KB Output is correct
53 Correct 37 ms 11816 KB Output is correct
54 Correct 39 ms 11756 KB Output is correct
55 Correct 39 ms 11768 KB Output is correct
56 Correct 11 ms 5484 KB Output is correct
57 Correct 12 ms 5424 KB Output is correct
58 Correct 44 ms 10444 KB Output is correct
59 Correct 41 ms 10444 KB Output is correct
60 Correct 43 ms 10504 KB Output is correct
61 Correct 44 ms 10564 KB Output is correct
62 Correct 180 ms 10572 KB Output is correct
63 Correct 328 ms 10564 KB Output is correct
64 Correct 101 ms 10956 KB Output is correct
65 Correct 260 ms 10924 KB Output is correct
66 Correct 505 ms 10900 KB Output is correct
67 Correct 44 ms 10192 KB Output is correct
68 Correct 59 ms 11868 KB Output is correct
69 Correct 53 ms 11992 KB Output is correct
70 Correct 43 ms 11952 KB Output is correct
71 Correct 48 ms 11972 KB Output is correct
72 Correct 44 ms 11868 KB Output is correct
73 Correct 51 ms 11896 KB Output is correct
74 Correct 47 ms 11988 KB Output is correct