Submission #516987

#	Time	Username	Problem	Language	Result	Execution time	Memory
516987		nighty	Commuter Pass (JOI18_commuter_pass)	C++17	0 / 100	190 ms	13300 KiB

commuter_pass

#include <bits/stdc++.h>

using namespace std;

vector<long long> dijkstra(int start, vector<vector<pair<int, int>>>& g) {
    int n = g.size();
    vector<long long> d(n, numeric_limits<long long>::max());
    d[start] = 0;
    set<pair<long long, int>> s; // {d[i], i}
    s.insert({0, start});
    while (!s.empty()) {
        int i = s.begin()->second;
        s.erase(s.begin());
        for (auto [j, w] : g[i]) {
            if (d[i] + w < d[j]) {
                s.erase({d[j], j});
                d[j] = d[i] + w;
                s.insert({d[j], j});
            }
        }
    }
    return d;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m;
    cin >> n >> m;
    int s, t;
    cin >> s >> t;
    --s, --t;
    int u, v;
    cin >> u >> v;
    --u, --v;
    vector<vector<pair<int, int>>> g(n);
    for (int _m = 0; _m < m; ++_m) {
        int a, b, w;
        cin >> a >> b >> w;
        --a, --b;
        g[a].push_back({b, w});
        g[b].push_back({a, w});
    }
    auto d = dijkstra(s, g);
    cout << d[t] << '\n';
    return 0;
}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 15
• Subtask 3: 0 / 24
• Subtask 4: 0 / 45