제출 #1009855

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1009855		Mardonbekhazratov	악어의 지하 도시 (IOI11_crocodile)	C++17	46 / 100	2 ms	604 KiB

crocodile

#include "crocodile.h"
#include<bits/stdc++.h>
#define ll long long
using namespace std;

vector<bool>is,vis;
vector<vector<pair<int,int>>>v;
vector<priority_queue<int>>dp;

const int INF=1e9;


int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){
    is.assign(N,false);
    vis.assign(N,false);
    for(int i=0;i<K;i++) is[P[i]]=true;
    v.resize(N);
    for(int i=0;i<M;i++){
        v[R[i][0]].push_back({R[i][1],L[i]});
        v[R[i][1]].push_back({R[i][0],L[i]});
    }
    dp.resize(N);
    priority_queue<array<int,3>>q;
    for(int i=0;i<K;i++){
        q.push({2,0,P[i]});
        dp[P[i]].push(0);
    }
    while(!q.empty()){
        auto [sz,d,x]=q.top();
        q.pop();
        if(-d<dp[x].top()) continue;
        if(vis[x]) continue;
        vis[x]=true;
        for(auto [z,w]:v[x]){
            if(dp[z].size()<2){
                dp[z].push(dp[x].top()+w);
                q.push({(int)dp[z].size(),-dp[z].top(),z});
            }
            else if(dp[x].top()+w<dp[z].top()){
                dp[z].pop();
                dp[z].push(dp[x].top()+w);
                q.push({(int)dp[z].size(),-dp[z].top(),z});
            }
        }
    }
    return dp[0].top();
}

• Subtask 1: 46 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11