Submission #852331

#	Time	Username	Problem	Language	Result	Execution time	Memory
852331		uped	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	656 ms	77828 KiB

crocodile

#include "crocodile.h"

#include <bits/stdc++.h>

using namespace std;

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]) {
    vector<vector<pair<int, int>>> adj(N);
    for (int i = 0; i < M; ++i) {
        adj[R[i][0]].emplace_back(R[i][1], L[i]);
        adj[R[i][1]].emplace_back(R[i][0], L[i]);
    }
    priority_queue<pair<int, int>> pq;
    vector<pair<int, int>> distance(N, {-1, -1});
    vector<bool> is_exit(N);
    for (int i = 0; i < K; ++i) {
        is_exit[P[i]] = true;
        pq.emplace(0, P[i]);
        distance[P[i]] = {0, 0};
    }
    while (!pq.empty()) {
        auto [dist, a] = pq.top(); pq.pop();
        auto& [min, min2] = distance[a];
        if (min == -1 || -dist < min) {
            min2 = min;
            min = -dist;
        } else if (min2 == -1 || -dist < min2) {
            min2 = -dist;
        } else if (!is_exit[a]) {
            continue;
        }
        if (min2 == -1) continue;
        for (auto [b, w] : adj[a]) {
            if (!is_exit[b]) {
                pq.emplace((min2 + w) * -1, b);
            }
        }
    }
    return distance[0].second;
}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:22:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   22 |         auto [dist, a] = pq.top(); pq.pop();
      |              ^
crocodile.cpp:23:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   23 |         auto& [min, min2] = distance[a];
      |               ^
crocodile.cpp:33:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   33 |         for (auto [b, w] : adj[a]) {
      |                   ^

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