Submission #1239932

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239932		countless	악어의 지하 도시 (IOI11_crocodile)	C++20	0 / 100	1 ms	584 KiB

crocodile

#include "crocodile.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;

#define sp <<" "<<
#define endl "\n"

const ll INF = 1e18;

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]) {
    vector<vector<pair<int, ll>>> adj(N);
    for (int i = 0; i < M; i++) {
        auto &[u, v] = R[i];
        adj[u].emplace_back(v, L[i]);
        adj[v].emplace_back(u, L[i]);
    }

    using state = tuple<ll, int>;
    vector<ll> dist(N, INF), cnt(N, 0);
    priority_queue<state, vector<state>, greater<state>> pq;
    for (int i = 0; i < K; i++) {
        dist[P[i]] = 0;
        pq.emplace(0, P[i]);
        pq.emplace(0, P[i]);
    }

    while (!pq.empty()) {
        auto [d, u] = pq.top(); pq.pop();
        // cerr << u sp d << endl;

        if (d > dist[u]) continue;
        if (cnt[u] < 1) {
            cnt[u]++;
            continue;
        }

        dist[u] = d;
        
        for (auto &[v, w] : adj[u]) {
            if (dist[u] + w < dist[v]) {
                pq.emplace(dist[u] + w, v);
            }
        }
    }

    // for (int i = 0; i < N; i++) {
    //     cerr << (dist[i] == INF ? -1 : dist[i]) << " ";
    // }   cerr << endl;
    return dist[0];
}

• Subtask 1: 0 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11