제출 #1274390

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1274390		Faggi	사이버랜드 (APIO23_cyberland)	C++20	97 / 100	3089 ms	162764 KiB

cyberland

#include <bits/stdc++.h>
#define ll int
#define sz(x) int(x.size())
#define forn(i, n) for (i = 0; i < n; i++)
#define all(x) x.begin(), x.end()
#define pb push_back
#define mp make_pair
#define fr first
#define se second
using namespace std;

const int MAXN = 1e5 + 1;

vector<pair<ll, ll>> grafo[MAXN];
ll ar[MAXN], h;
bool vis[MAXN];
vector<ll> pos;
struct nod
{
    ll nodo, k;
    double dis;
    bool operator<(const nod &x)
        const
    {
        return dis > x.dis;
    }
};
bool ap = 0;
void dfs(ll nod)
{
    if (nod == h)
    {
        ap = 1;
        return;
    }
    vis[nod] = 1;
    if (ar[nod] == 0 || nod == 0)
        pos.pb(nod);
    for (auto k : grafo[nod])
        if (vis[k.fr] == 0)
            dfs(k.fr);
}

void init(ll N)
{
    pos.resize(0);
    for (ll i = 0; i < N; i++)
    {
        grafo[i].resize(0);
        vis[i] = 0;
    }
    ap = 0;
}

double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr)
{
    K = min(K, 80);
    init(N);
    ll i;
    h = H;
    for (i = 0; i < N; i++)
        ar[i] = arr[i];
    for (i = 0; i < M; i++)
    {
        grafo[x[i]].pb({y[i], c[i]});
        grafo[y[i]].pb({x[i], c[i]});
    }

    priority_queue<nod> pq;
    nod v;
    vector<vector<double>> dist(N, vector<double>(K + 1, 1e14));
    dfs(0);
    if (ap == 0)
        return -1;
    for (auto k : pos)
    {
        v.k = 0;
        v.nodo = k;
        v.dis = 0;
        dist[k][0] = 0;
        pq.push(v);
    }
    while (pq.size())
    {
        v = pq.top();
        pq.pop();
        if (v.nodo == H)
            continue;
        if (v.dis != dist[v.nodo][v.k])
            continue;
        for (auto k : grafo[v.nodo])
        {
            if (ar[k.fr] == 0)
                continue;
            nod nV;
            nV.nodo = k.fr;
            nV.k = v.k + 1;
            nV.dis = (v.dis + k.se)/2;
            if (ar[nV.nodo] == 2 && nV.k <= K && nV.dis < dist[k.fr][nV.k])
            {
                dist[k.fr][nV.k] = nV.dis;
                pq.push(nV);
            }
            nV.k--;
            nV.dis = v.dis + k.se;
            if (nV.dis < dist[k.fr][nV.k])
            {
                dist[k.fr][nV.k] = nV.dis;
                pq.push(nV);
            }
        }
    }
    double mi = dist[H][0];
    for (i = 1; i <= K; i++)
        mi = min(mi, dist[H][i]);
    return mi;
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 19 / 19
• Subtask 5: 7 / 7
• Subtask 6: 16 / 16
• Subtask 7: 29 / 29
• Subtask 8: 0 / 3