Submission #968514

#	Time	Username	Problem	Language	Result	Execution time	Memory
968514		saayan007	Cyberland (APIO23_cyberland)	C++17	44 / 100	36 ms	11836 KiB

cyberland

#include "bits/stdc++.h"
#include "cyberland.h"
using namespace std;
 
#include <vector>
 
void bfs(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr, vector<pair<int, double>> adj[], double dist[]) {

    bool vis[N] = {};
    queue<int> qu;
    vis[0] = 1;
    qu.push(0);
    dist[0] = 0;

    while(!qu.empty()) {
        int a = qu.front();
        qu.pop();
        if(a == H) continue;
        for(auto [b, w] : adj[a]) {
            if(vis[b]) continue;
            vis[b] = 1;
            qu.push(b);
            if(arr[b] == 0) dist[b] = 0;
        }
    }
}

double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
    vector<pair<int, double>> adj[N];
    for(int i = 0; i < M; ++i) {
        adj[x[i]].emplace_back(y[i], c[i]);
        adj[y[i]].emplace_back(x[i], c[i]);
    }
 
    double dist[N];
    for(int i = 0; i < N; ++i) dist[i] = -1;
 
    bfs(N, M, K, H, x, y, c, arr, adj, dist);
 
    priority_queue<pair<double, int>> pq;
    for(int i = 0; i < N; ++i) {
        if(dist[i] == 0 || i == 0) {
            dist[i] = 0;
            pq.emplace(-dist[i], i);
        }
    }
 
    while(!pq.empty()) {
        int a = pq.top().second;
        double d = -pq.top().first;
        pq.pop();
        if(dist[a] < d || a == H) {
            continue;
        }
 
        for(auto [b, w] : adj[a]) {
            if(dist[b] == -1 || d + w < dist[b]) {
                dist[b] = d + w;
                pq.emplace(-dist[b], b);
            }
        }
    }
 
    return dist[H];
}

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