Submission #959299

#	Time	Username	Problem	Language	Result	Execution time	Memory
959299		batats	Cyberland (APIO23_cyberland)	C++17	0 / 100	171 ms	6224 KiB

cyberland

#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
const int MAXN = 1005;
const ll INF = 1e18;
vector<pii> adj[MAXN];
ll dist[MAXN][35];
bool visited[MAXN][35];
int special[MAXN];

double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
    for (int i = 0; i < N; i++) {
        adj[i].clear();
        special[i] = arr[i];
        for (int j = 0; j <= K; j++) {
            dist[i][j] = INF;
            visited[i][j] = false;
        }
    }
    for (int i = 0; i < M; i++) {
        adj[x[i]].push_back({y[i], c[i]});
        adj[y[i]].push_back({x[i], c[i]});
    }
    priority_queue<pair<ll, pii>, vector<pair<ll, pii>>, greater<pair<ll, pii>>> pq;
    dist[0][0] = 0;
    pq.push({0, {0, 0}});
    while (!pq.empty()) {
        int u = pq.top().second.first;
        int k = pq.top().second.second;
        pq.pop();
        if (visited[u][k]) continue;
        visited[u][k] = true;
        for (pii p : adj[u]) {
            int v = p.first;
            int w = p.second;
            if (special[v] == 2 && k < K && dist[v][k + 1] > dist[u][k] / 2 + w) {
                dist[v][k + 1] = dist[u][k] / 2 + w;
                pq.push({dist[v][k + 1], {v, k + 1}});
            }
            if (special[v] == 0 && dist[v][k] > w) {
                dist[v][k] = w;
                pq.push({dist[v][k], {v, k}});
            }
            if (dist[v][k] > dist[u][k] + w) {
                dist[v][k] = dist[u][k] + w;
                pq.push({dist[v][k], {v, k}});
            }
        }
    }
    ll ans = INF;
    for (int i = 0; i <= K; i++) {
        ans = min(ans, dist[H][i]);
    }
    return ans == INF ? -1 : ans;
}

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