Submission #773123

#	Time	Username	Problem	Language	Result	Execution time	Memory
773123		JakobZorz	Cyberland (APIO23_cyberland)	C++17	68 / 100	3074 ms	11620 KiB

cyberland

#include "cyberland.h"
#include <vector>
#include <iostream>
#include <limits.h>
#include <queue>
#include <algorithm>
typedef long long ll;
const double MAX_DIST=1000000000000000000.0;
using namespace std;

int n,m,k,h;
vector<pair<int,double>>nodes[100000];
double dist[100000];
bool vis[100000];

void dfs(int node){
    if(vis[node])
        return;
    vis[node]=true;
    if(node==h)
        return;
    for(pair<int,double>ne:nodes[node]){
        dfs(ne.first);
    }
}

double solve(int N,int M,int K,int H,vector<int>x,vector<int>y,vector<int>c,vector<int>arr){
    n=N;
    m=M;
    k=K;
    h=H;
    for(int i=0;i<n;i++){
        nodes[i].clear();
        dist[i]=MAX_DIST;
        vis[i]=false;
    }
    for(int i=0;i<m;i++){
        nodes[x[i]].emplace_back(y[i],c[i]);
        nodes[y[i]].emplace_back(x[i],c[i]);
    }
    dfs(0);
    dist[0]=0;
    queue<int>q;
    q.push(0);
    if(!vis[h])
        return -1;
    for(int i=0;i<n;i++){
        if(arr[i]==0&&vis[i]){
            dist[i]=0;
            q.push(i);
        }
    }
    
    while(!q.empty()){
        int curr=q.front();
        q.pop();
        if(curr==h)
            continue;
        for(pair<int,double>ne:nodes[curr]){
            double new_dist=dist[curr]+ne.second;
            if(new_dist<dist[ne.first]){
                dist[ne.first]=new_dist;
                q.push(ne.first);
            }
        }
    }
    
    while(k--){
        for(int i=0;i<n;i++){
            if(arr[i]==2&&vis[i]){
                for(pair<int,double>ne:nodes[i]){
                    double new_dist=dist[i]/2+ne.second;
                    if(new_dist<dist[ne.first]){
                        dist[ne.first]=new_dist;
                        q.push(ne.first);
                    }
                }
            }
        }
        
        while(!q.empty()){
            int curr=q.front();
            q.pop();
            if(curr==h)
                continue;
            for(pair<int,double>ne:nodes[curr]){
                double new_dist=dist[curr]+ne.second;
                if(new_dist<dist[ne.first]){
                    dist[ne.first]=new_dist;
                    q.push(ne.first);
                }
            }
        }
    }
    
    return dist[h];
}

• 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: 0 / 29
• Subtask 8: 0 / 3