Submission #308829

#	Time	Username	Problem	Language	Result	Execution time	Memory
308829		juggernaut	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	1024 ms	75384 KiB

crocodile

#include"crocodile.h"
#include<bits/stdc++.h>
#define fr first
#define sc second
using namespace std;
typedef long long ll;
vector<pair<ll,ll>>g[100005];
pair<ll,ll>a[100005];
ll inf=2e9;
int travel_plan(int n,int m,int r[][2],int l[],int k,int p[]){
    for(int i=0;i<n;i++)a[i]={inf,inf};
    set<pair<ll,ll>>q;
    for(int i=0;i<m;i++){
        g[r[i][0]].push_back({r[i][1],l[i]});
        g[r[i][1]].push_back({r[i][0],l[i]});
    }
    for(int i=0;i<k;i++)
        q.insert({0,p[i]}),a[p[i]]={0,0};
    while(!q.empty()){
        ll len=q.begin()->fr;
        ll v=q.begin()->sc;
        q.erase(q.begin());
        if(len>a[v].sc)continue;
        for(auto to:g[v])
            if(a[to.fr].sc>len+to.sc){
                a[to.fr].sc=len+to.sc;
                if(a[to.fr].fr>a[to.fr].sc)swap(a[to.fr].fr,a[to.fr].sc);
                if(a[to.fr].sc<inf)q.insert({a[to.fr].sc,to.fr});
            }
    }
    return a[0].sc;
}

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