Submission #849112

#	Time	Username	Problem	Language	Result	Execution time	Memory
849112		adhityamv	Cyberland (APIO23_cyberland)	C++17	44 / 100	33 ms	11856 KiB

cyberland

#include <bits/stdc++.h>
using namespace std;
const int N=100000;
vector<pair<int,double>> edges[N];
bool visited[N]={};
double ans[N];
void dfs(int u,int h){
    for(auto v:edges[u]){
        if(v.first==h) continue;
        if(!visited[v.first]){
            visited[v.first]=true;
            dfs(v.first, h);
        }
    }
}
double solve(int n,int m,int k,int h,vector<int> x,vector<int> y,vector<int> c,vector<int> a){
    for(int i=0;i<n;i++) ans[i]=-1;
    for(int i=0;i<m;i++){
        edges[x[i]].push_back(make_pair(y[i],(double) c[i]));
        edges[y[i]].push_back(make_pair(x[i],(double) c[i]));
    }
    priority_queue<pair<double,int>,vector<pair<double,int>>,greater<pair<double,int>>> pq;
    ans[0]=0;
    visited[0]=true;
    dfs(0,h);
    pq.push(make_pair(0,0));
    for(int i=0;i<n;i++){
        if(a[i]==0 && visited[i]){
            ans[i]=0;
            pq.push(make_pair(0,i));
        }
    }
    while(!pq.empty()){
        auto u=pq.top();
        pq.pop();
        if(u.first==h) continue;
        if(u.first!=ans[u.second]) continue;
        for(auto v:edges[u.second]){
            if(ans[v.first]==-1 || ans[v.first]>u.first+v.second){
                ans[v.first]=u.first+v.second;
                pq.push(make_pair(ans[v.first],v.first));
            }
        }
    }
    double fans=ans[h];
    for(int i=0;i<n;i++){
        edges[i].clear();
        visited[i]=false;
        ans[i]=0;
    }
    return fans;
}

• 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