Submission #1048665

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048665		MarwenElarbi	Crocodile's Underground City (IOI11_crocodile)	C++17	100 / 100	298 ms	77636 KiB

crocodile

#include <bits/stdc++.h>
using namespace std;
#include "crocodile.h"
#define pb push_back
#define fi first
#define se second
const int nax=1e5+5;
vector<pair<int,int>> adj[nax];
int travel_plan(int N, int M, int R[][2], int L[], int K, int P[])
{
  for (int i = 0; i < M; ++i)
  {
    adj[R[i][0]].pb({R[i][1],L[i]});
    adj[R[i][1]].pb({R[i][0],L[i]});
  }
  priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> pq;
  int vis[N];
  memset(vis,0,sizeof vis);
  for (int i = 0; i < K; ++i)
  {
    pq.push({0,P[i]});
    vis[P[i]]++;
  }
  while(!pq.empty()){
    pair<int,int> node=pq.top();
    pq.pop();
    if(vis[node.se]++ == 1){
      if(node.se==0) return node.fi;
      for(auto u:adj[node.se]){
        pq.push({u.se+node.fi,u.fi});
      }
    }
  }
  return N;
}

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