Submission #598405

#	Time	Username	Problem	Language	Result	Execution time	Memory
598405		daria	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	485 ms	63156 KiB

crocodile

#include "crocodile.h"
#include "bits/stdc++.h"
using namespace std;
#define f first
#define s second

const int INF = 1000000005;

int travel_plan(int n, int m, int r[][2], int l[], int k, int p[]){
// return -1;
 vector<pair<int, int> > adj[n];
 for(int i=0; i<m; ++i){
  adj[r[i][1]].push_back({r[i][0], l[i]});
  adj[r[i][0]].push_back({r[i][1], l[i]});
 }
 vector<pair<int, int> > d(n, {INF, INF});
 vector<bool> vis(n, 0);
 priority_queue<pair<int, int> > pq;
 for(int i=0; i<k; ++i){
  d[p[i]].f = d[p[i]].s =  0;
  pq.push({0, p[i]});
 }
 while(!pq.empty()){
 /*for(int i=0; i<n; ++i)
  cout << d[i].f << " " << d[i].s << endl;
 cout << endl;*/
  int a = pq.top().s; pq.pop();
  if(vis[a]) continue;
  vis[a] = 1;
  for(auto P : adj[a]){
   int b = P.f, w = P.s;
   if(d[a].s + w <= d[b].f){
    d[b].s = d[b].f;
    d[b].f = d[a].s + w;
    pq.push({-d[b].s, b});
   } else if(d[a].s + w < d[b].s){
    d[b].s = d[a].s + w;
    pq.push({-d[b].s, b});
   }
  }
 }
 //cout << d[0].s << endl;
 if(d[0].s == INF) return -1;
 return d[0].s;
}

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