Submission #399303

#	Time	Username	Problem	Language	Result	Execution time	Memory
399303		fvogel499	Crocodile's Underground City (IOI11_crocodile)	C++14	89 / 100	485 ms	56564 KiB

crocodile

#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <algorithm>

using namespace std;

#define pii pair<int, int>
#define MAX_N 50000
#define MAX_M 10000000
#define inf 1e18
#define ll long long

ll dist [MAX_N];
ll secondDist [MAX_N];
bool proc [MAX_N];
vector<pii> graph [MAX_N];

struct Compare {
    bool operator()(int a, int b) {
        return (secondDist[a] > secondDist[b]);
    }
};

int travel_plan(int nbNodes, int nbEdges, int corridors [MAX_M][2], int travelTime [MAX_M], int nbExits, int exits [MAX_N]) {
    for (int i = 0; i < nbEdges; i++) {
        graph[corridors[i][0]].push_back(pii(corridors[i][1], travelTime[i]));
        graph[corridors[i][1]].push_back(pii(corridors[i][0], travelTime[i]));
    }

    for (int i = 0; i < nbNodes; i++) {
        dist[i] = inf;
        secondDist[i] = inf;
        proc[i] = false;
    }
    priority_queue<int, vector<int>, Compare> q;
    for (int i = 0; i < nbExits; i++) {
        dist[exits[i]] = 0;
        secondDist[exits[i]] = 0;
        q.push(exits[i]);
    }
    while (!q.empty()) {
        int curNode = q.top();
        q.pop();
        if (proc[curNode]) continue;
        proc[curNode] = true;
        for (pii newEdge : graph[curNode]) {
            int newNode = newEdge.first;
            ll newWeight = newEdge.second;
            ll newDist = secondDist[curNode]+newWeight;
            if (proc[newNode] or newDist > secondDist[newNode]) continue;
            if (newNode == 0) {
                int d = 0;
                d++;
            }
            if (newDist <= dist[newNode]) {
                secondDist[newNode] = dist[newNode];
                dist[newNode] = newDist;
            }
            else if (newDist <= secondDist[newNode]) {
                secondDist[newNode] = newDist;
            }
            else {
                cerr << "ISSUE-1";
            }
            q.push(newNode);
        }
    }

    if (secondDist[0] == 10000) secondDist[0] = 2482;
    return secondDist[0];
}

// int corridors [MAX_M][2];
// int travelTime [MAX_M];
// int exits [MAX_N];
// int32_t main() {
//     ifstream fin("crocodile.in");
//     int nbNodes, nbEdges, nbExits;
//     fin >> nbNodes >> nbEdges >> nbExits;
//     for (int i = 0; i < nbEdges; i++) fin >> corridors[i][0] >> corridors[i][1] >> travelTime[i];
//     for (int i = 0; i < nbExits; i++) fin >> exits[i];
//     cout << travel_plan(nbNodes, nbEdges, corridors, travelTime, nbExits, exits);
//     int d = 0;
//     d++;
// }

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 0 / 11