Submission #960522

#	Time	Username	Problem	Language	Result	Execution time	Memory
960522		thinknoexit	Security Guard (JOI23_guard)	C++17	37 / 100	135 ms	21564 KiB

guard

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 200200;
int a[N];
struct A {
    int v;
    ll w;
    bool operator < (const A& o) const {
        return w > o.w;
    }
};
priority_queue<A> pq;
int p[N];
ll dis[N];
bool vis[N];
vector<int> adj[N];
ll ans = 0;
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m, q;
    cin >> n >> m >> q;
    for (int i = 1;i <= n;i++) {
        cin >> a[i];
    }
    while (m--) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    int idx = max_element(a + 1, a + 1 + n) - a;
    memset(dis, 0x3f, sizeof dis);
    dis[idx] = 0;
    pq.push({ idx, 0 });
    while (!pq.empty()) {
        auto x = pq.top();
        pq.pop();
        int v = x.v;
        if (dis[v] < x.w) continue;
        for (auto& x : adj[v]) {
            if (dis[x] > dis[v] + a[v]) {
                p[x] = v;
                dis[x] = dis[v] + a[v];
                pq.push({ x, dis[x] });
            }
        }
    }
    for (int i = 1;i <= n;i++) {
        ans += a[p[i]];
    }
    cout << ans;
    return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 12 / 12
• Subtask 4: 0 / 13
• Subtask 5: 0 / 8
• Subtask 6: 0 / 18
• Subtask 7: 0 / 24