제출 #955047

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
955047		3as8	사이버랜드 (APIO23_cyberland)	C++17	15 / 100	28 ms	7000 KiB

cyberland

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

#include <vector>

#define pll pair<ll, ll>
#define ll long long
using namespace std;

struct node {
    ll v, w;
};

void dijkstra(vector<vector<node> >& graph, vector<bool>& can, vector<ll>& distances, vector<int>& t, ll startIndex) {

    priority_queue<pll, vector<pll>, greater<> > Q;

    distances[startIndex] = 0;
    Q.push({0, startIndex});

    for(int i = 0; i < graph.size(); i++) {
        if(i == startIndex) continue;

        if(t[i] == 0 && can[i]) {
            distances[i] = 0;
            Q.push({0, startIndex});
        }
    }

    while(!Q.empty()) {

        ll node = Q.top().second, dist = Q.top().first;
        Q.pop();

        if(distances[node] < dist) continue;


        for(auto [v, w] : graph[node]) {

            if(distances[node] + w < distances[v]) {
                distances[v] = distances[node] + w;
                Q.push({distances[v], v});
            }
        }
    }


}

double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr) {

    vector<vector<node> > graph(N);

    for(int i = 0; i < M; i++) {
        graph[x[i]].push_back({y[i], c[i]});
        graph[y[i]].push_back({x[i], c[i]});
    }

    vector<bool> can(N, false);

    vector<bool> visited(N, false);
    queue<ll> Q;
    Q.push(0);
    visited[0] = true;
    while(!Q.empty()) {

        ll node = Q.front();
        can[node] = true;
        Q.pop();

        for(auto [el, w] : graph[node]) {
            if(el == H) continue;
            if(visited[el]) continue;

            visited[el] = true;
            Q.push(el);
        }
    }


    vector<ll> distances(N, LLONG_MAX);
    dijkstra(graph, can, distances, arr, 0);

    ll ans = distances[H] == LLONG_MAX ? -1 : distances[H];

    return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

cyberland.cpp: In function 'void dijkstra(std::vector<std::vector<node> >&, std::vector<bool>&, std::vector<long long int>&, std::vector<int>&, long long int)':
cyberland.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<node> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(int i = 0; i < graph.size(); i++) {
      |                    ~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 8 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 7 / 7
• Subtask 6: 0 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3