Submission #1268985

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268985		nerrrmin	Crocodile's Underground City (IOI11_crocodile)	C++20	100 / 100	390 ms	50988 KiB

crocodile

#include "crocodile.h"
#include<bits/stdc++.h>
#define pb push_back
using namespace std;
const int maxn = 2e5 + 10;
int n, m;
vector < pair < int, int > > g[maxn];
int k, isexit[maxn];
int dist[maxn];
int used[maxn];
void dijkstra()
{
    priority_queue < pair < int, int > > q;
    for (int i = 0; i < n; ++ i)
    {
        if(!isexit[i])dist[i] = 1e9;
        else
        {
            q.push({0, i});
            used[i] = 1;
            dist[i] = 0;
        }
    }
    while(!q.empty())
    {
        int w = q.top().second;
        int d = -q.top().first;
        q.pop();
        if(used[w] >= 2)continue;
        used[w] ++;
        if(used[w] == 1)continue;
        dist[w] = d;
        for (auto &[nb, cost]: g[w])
        {
            if(dist[nb] > dist[w] + cost)
            {
                q.push({-dist[w] - cost, nb});
            }
        }
    }
}
int travel_plan(int N, int M, int R[][2], int L[], int K, int P[])
{
    n = N;
    m = M;
    for (int i = 0; i < m; ++ i)
    {
        int from, to, cost;
        from = R[i][0];
        to = R[i][1];
        cost = L[i];
        g[from].pb({to, cost});
        g[to].pb({from, cost});
    }
    k = K;
    for (int i = 0;i < k; ++ i)
        isexit[P[i]] = 1;
    dijkstra();
  return dist[0];
}

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