Submission #249741

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
249741	2020-07-15 16:26:13	eohomegrownapps	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	739 ms	97500 KiB

crocodile

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#include "crocodile.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<vector<pair<ll,ll>>> adjlist; //val,node
ll n,k;
vector<ll> exits; //k of them
ll INF = 1e18;
ll dijkstra(){
    //source is 0
    vector<pair<ll,ll>> distances(n,{INF,INF}); //second then first
    priority_queue<pair<pair<ll,ll>,ll>,vector<pair<pair<ll,ll>,ll>>,greater<pair<pair<ll,ll>,ll>>> pq;
    //second,first
    for (ll i = 0; i<k; i++){
        distances[exits[i]]={0,0};
        pq.push({{0,0},exits[i]});
    }
    while (pq.size()>0){
        auto f = pq.top();
        pq.pop();
        /*cout<<"======\n";
        cout<<f.second<<'\n';
        for (auto p : distances){
            cout<<p.first<<" "<<p.second<<'\n';
        }*/
        //cout<<"check: "<<distances[f.second].first<<" "<<distances[f.second].second<<", "<<f.first.first<<" "<<f.first.second<<'\n';
        if (distances[f.second]<f.first){
            continue; //can't remember this condition
        }
        for (auto p : adjlist[f.second]){
 
 
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• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11