Submission #1192416

#	Time	Username	Problem	Language	Result	Execution time	Memory
1192416		julia_08	Crocodile's Underground City (IOI11_crocodile)	C++20	100 / 100	574 ms	60444 KiB

crocodile

#include <bits/stdc++.h>
#include "crocodile.h"

using namespace std;

using ll = long long;

const int MAXN = 1e5 + 10;

int chamber[MAXN];

int marc[MAXN];

ll dist[MAXN][2];

vector<pair<int, int>> adj[MAXN];

int travel_plan(int n, int m, int r[][2], int l[], int k, int p[]){

  for(int i=0; i<n; i++) dist[i][0] = dist[i][1] = 1e18;

  for(int i=0; i<k; i++) chamber[p[i]] = 1;

  for(int i=0; i<m; i++){
    adj[r[i][0]].push_back({r[i][1], l[i]});
    adj[r[i][1]].push_back({r[i][0], l[i]});
  }

  priority_queue<pair<ll, int>> q;

  for(int i=0; i<n; i++){
    if(chamber[i]){
      q.push({0, i});
      dist[i][0] = dist[i][1] = 0;
    }
  }

  while(!q.empty()){

    int v = q.top().second; q.pop();

    if(marc[v]) continue;
    marc[v] = 1;

    for(auto [u, w] : adj[v]){

      if(dist[v][1] + w <= dist[u][0]){
        dist[u][1] = dist[u][0];
        dist[u][0] = dist[v][1] + w;

      } else if(dist[v][1] + w < dist[u][1]) dist[u][1] = dist[v][1] + w;

      q.push({-dist[u][1], u});

    }

  }

  return dist[0][1];
}

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