This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 1e5+5;
const int INF = 1e8;
vector<pii> adj[N];
ll d[N];
int vis[N];
double solve(int n, int m, int k, int h, vector<int> u, vector<int> v, vector<int> w, vector<int> arr){
for(int i = 0; i < m; ++i){
adj[u[i]].pb({v[i], w[i]});
adj[v[i]].pb({u[i], w[i]});
}
for(int i = 0; i <= n; ++i)
vis[i] = 0, d[i] = -1;
queue<int> q;
q.push(h);
vis[h] = 1;
d[h] = 0;
while(!q.empty()){
int x = q.front();
q.pop();
for(auto [i, val] : adj[x])
if(!vis[i]){
vis[i] = 1;
d[i] = d[x]+val;
q.push(i);
}
}
double answer = 0;
answer += d[0];
for(int i = 0; i < n; ++i)
if(arr[i] == 0)
umin(answer, (double)d[i]);
return answer;
}
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