Submission #932089

#	Time	Username	Problem	Language	Result	Execution time	Memory
932089		Darren0724	Cyberland (APIO23_cyberland)	C++17	15 / 100	3043 ms	8660 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
//#include "stub.cpp"
using namespace std;
const long long INF=1e15;
const double eps=1e-10;
double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> v, vector<int> c1) {
    vector<pair<int,double>> adj[n+1];
    for(int i=0;i<m;i++){
        adj[x[i]].push_back({y[i],v[i]});
        adj[y[i]].push_back({x[i],v[i]});
    }
    vector dis(n,(long double)INF);
    vector vis(n,(int)0);
    priority_queue<pair<double,int>> pq;
    dis[0]=0;
    vis[0]=1;
    for(int i=0;i<=k;i++){
        for(int j=0;j<n;j++){
            if(vis[j]){
                if(c1[j]==0)dis[j]=0;
                if(c1[j]==2)dis[j]/=2;
                pq.push({-dis[j],j});
            }
        }
        while(pq.size()){
            auto [a,b]=pq.top();
            pq.pop();
            a=-a;
            //if(dis[b]>=a+eps)continue;
            for(auto [c,d]:adj[b]){
                double cost=(c1[c]==0?0:a+d);
                if(cost<dis[c]){
                    dis[c]=cost;
                    vis[c]=1;
                    pq.push({-dis[c],c});
                }
            }
        }
    }
    return (vis[h]==0?-1:dis[h]);
}   

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