이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "bits/stdc++.h"
#include "cyberland.h"
using namespace std;
#include <vector>
double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
vector<pair<int, double>> adj[N];
for(int i = 0; i < M; ++i) {
adj[x[i]].emplace_back(y[i], c[i]);
adj[y[i]].emplace_back(x[i], c[i]);
}
double dist[N];
for(int i = 0; i < N; ++i) dist[i] = -1;
dist[0] = 0;
// bfs 1
queue<int> qu;
bool vis[N] = {};
vis[0] = 1;
qu.push(0);
while(!qu.empty()) {
int a = qu.front();
qu.pop();
if(a == H) continue;
if(arr[a] == 0) {
dist[a] = 0;
}
for(auto [b, w] : adj[a]) {
if(vis[b]) continue;
vis[b] = 1;
qu.push(b);
}
}
// bfs 1 ends
priority_queue<pair<double, int>> pq;
for(int i = 0; i < N; ++i) {
if(arr[i] == 0 || i == 0) {
dist[i] = 0;
pq.emplace(-dist[i], i);
}
}
while(!pq.empty()) {
int a = pq.top().second;
double d = -pq.top().first;
pq.pop();
if(dist[a] < d || a == H) {
continue;
}
for(auto [b, w] : adj[a]) {
if(dist[b] == -1 || d + w < dist[b]) {
dist[b] = d + w;
pq.emplace(-dist[b], b);
}
}
}
return dist[H];
}
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