oj.uz

Submission #898144

# Submission time Handle Problem Language Result Execution time Memory
898144 2024-01-04T10:55:51 Z oviyan_gandhi Olympic Bus (JOI20_ho_t4) C++17
26 / 100
 1000 ms 6620 KB 
#define ONLINE_JUDGE
#include <bits/stdc++.h>
using namespace std;
#ifdef ONLINE_JUDGE
    #define endl '\n'
#endif
#define int long long
#define all(x) x.begin(), x.end()
typedef vector<int> vi; typedef vector<vector<int>> vvi; typedef vector<bool> vb; typedef vector<vector<bool>> vvb; typedef pair<int, int> pii; typedef map<int, int> mii; typedef map<int, vector<int>> mivi;
const int mod = 1000000007; // 10^9 + 7
const int INF = 1e17;

#define MAXN 200
#define MAXM 50000
struct Edge {
    int u, v, c, d;
};

int n, m;
Edge edges[MAXM];
multiset<pii> adj[MAXN];
int dist[MAXN][MAXN];

int cost(){
    priority_queue<pii> pq;
    pq.push({0, 0});
    vi dis(n, INF);
    dis[0] = 0;
    while (!pq.empty()){
        auto [d, u] = pq.top();
        pq.pop();
        if (dis[u] != d) continue;
        for (auto [v, cd] : adj[u]){
            if (d + cd < dis[v]){
                dis[v] = d + cd;
                pq.push({dis[v], v});
            }
        }
    }
    int ret = dis[n-1];
    fill(dis.begin(), dis.end(), INF);
    dis[n-1] = 0;
    pq.push({0, n-1});
    while (!pq.empty()){
        auto [d, u] = pq.top();
        pq.pop();
        if (dis[u] != d) continue;
        for (auto [v, cd] : adj[u]){
            if (d + cd < dis[v]){
                dis[v] = d + cd;
                pq.push({dis[v], v});
            }
        }
    }
    return ret + dis[0];
}

void REM(int u, int v, int c){ adj[u].erase(adj[u].find({v, c})); }
void ADD(int u, int v, int c){ adj[u].insert({v, c}); }

void solve(){
    cin >> n >> m;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++)
            dist[i][j] = INF;
        dist[i][i] = 0;
        adj[i].clear();
    }
    for (int i = 0; i < m; i++){
        Edge &e = edges[i];
        cin >> e.u >> e.v >> e.c >> e.d;
        e.u--, e.v--;
        ADD(e.u, e.v, e.c);
        dist[e.u][e.v] = min(dist[e.u][e.v], e.c);
    }
    for (int k = 0; k < n; k++)
        for (int i = 0; i < n; i++)
            for (int j = 0; j < n; j++)
                dist[i][j] = min(dist[i][j], dist[i][k] + dist[k][j]);
    int ans = cost();
    for (int i = 0; i < m; i++){
        auto [u, v, c, d] = edges[i];
        int p = min(dist[0][n-1], dist[0][v] + c + dist[u][n-1])
              + min(dist[n-1][0], dist[n-1][v] + c + dist[u][0])
              + d;
        if (p < ans){
            REM(u, v, c);
            ADD(v, u, c);
            ans = min(ans, cost() + d);
            REM(v, u, c);
            ADD(u, v, c);
        }
    }
    cout << (ans >= INF ? -1 : ans) << endl;
}
 
int32_t main(){
#ifndef ONLINE_JUDGE
    auto begin = chrono::high_resolution_clock::now();
    freopen("sol.in", "r", stdin);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int T = 1;// cin >> T;
    for (int i = 1; i <= T; i++){
#ifndef ONLINE_JUDGE
        if (T != 1)
            cout << "Test Case #" << i << endl;
#endif
        solve();
    }
#ifndef ONLINE_JUDGE
    auto elapsed = chrono::duration_cast<chrono::nanoseconds>(chrono::high_resolution_clock::now() - begin);
    cout << "Time Taken : " << (elapsed.count() * 1e-9) << " seconds" << endl;
#endif
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 860 KB Output is correct
2 Correct 7 ms 604 KB Output is correct
3 Correct 9 ms 904 KB Output is correct
4 Correct 9 ms 860 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 7 ms 736 KB Output is correct
7 Correct 0 ms 600 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 127 ms 892 KB Output is correct
11 Correct 554 ms 880 KB Output is correct
12 Correct 29 ms 856 KB Output is correct
13 Correct 12 ms 1112 KB Output is correct
14 Correct 9 ms 908 KB Output is correct
15 Correct 11 ms 904 KB Output is correct
16 Correct 18 ms 1112 KB Output is correct

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 159 ms 6492 KB Output is correct
2 Correct 403 ms 6428 KB Output is correct
3 Correct 163 ms 6620 KB Output is correct
4 Correct 15 ms 1000 KB Output is correct
5 Correct 11 ms 892 KB Output is correct
6 Correct 7 ms 600 KB Output is correct
7 Correct 8 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Execution timed out 1033 ms 6480 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 856 KB Output is correct
2 Correct 12 ms 604 KB Output is correct
3 Correct 25 ms 4956 KB Output is correct
4 Correct 7 ms 604 KB Output is correct
5 Correct 31 ms 6236 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 53 ms 6236 KB Output is correct
9 Correct 73 ms 6372 KB Output is correct
10 Correct 37 ms 6324 KB Output is correct
11 Correct 46 ms 6304 KB Output is correct
12 Correct 33 ms 6248 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 34 ms 6160 KB Output is correct
20 Correct 50 ms 6388 KB Output is correct
21 Correct 33 ms 6228 KB Output is correct
22 Correct 34 ms 6188 KB Output is correct

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 860 KB Output is correct
2 Correct 7 ms 604 KB Output is correct
3 Correct 9 ms 904 KB Output is correct
4 Correct 9 ms 860 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 7 ms 736 KB Output is correct
7 Correct 0 ms 600 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 127 ms 892 KB Output is correct
11 Correct 554 ms 880 KB Output is correct
12 Correct 29 ms 856 KB Output is correct
13 Correct 12 ms 1112 KB Output is correct
14 Correct 9 ms 908 KB Output is correct
15 Correct 11 ms 904 KB Output is correct
16 Correct 18 ms 1112 KB Output is correct
17 Correct 159 ms 6492 KB Output is correct
18 Correct 403 ms 6428 KB Output is correct
19 Correct 163 ms 6620 KB Output is correct
20 Correct 15 ms 1000 KB Output is correct
21 Correct 11 ms 892 KB Output is correct
22 Correct 7 ms 600 KB Output is correct
23 Correct 8 ms 604 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Execution timed out 1033 ms 6480 KB Time limit exceeded
26 Halted 0 ms 0 KB -