# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
1083879 | kokoue | Evacuation plan (IZhO18_plan) | C++14 | 0 ms | 0 KiB |
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>
using namespace std;
int n,m,k,q;
bool is_npp[100001];
vector<pair<int,int>> edges[100001];
vector<long long> sp(100001,INT_MAX);
vector<int> npp;
map<pair<int,int>,bool> is;
void dijkstra()
{
priority_queue<pair<long long,int>> q;
vector<long long> dist(n+1,INT_MAX);
for(int i=0;i<npp.size();i++)
{
q.push({0,npp[i]});
dist[npp[i]]=0;
sp[npp[i]]=0;
}
while(!q.empty())
{
int curr=q.top().second;
long long currDist=-q.top().first;
q.pop();
if(dist[curr]<currDist) continue;
for(auto edge:edges[curr])
{
int next=edge.first;
int weight=edge.second;
if(dist[curr]+weight<dist[next])
{
dist[next]=dist[curr]+weight;
sp[next]=min(sp[next],dist[next]);
q.push({-dist[next],next});
}
}
}
}
int dijkstra(int start,int finish)
{
priority_queue<pair<long long,int>> q;
vector<long long> away(n+1,0);
q.push({sp[start],start});
away[start]=sp[start];
while(!q.empty())
{
int curr=q.top().second;
long long currAway=q.top().first;
q.pop();
if(away[curr]>currAway) continue;
for(auto edge:edges[curr])
{
int next=edge.first;
long long len=sp[next];
if(away[next]<min(len,away[curr]))
{
away[next]=min(len,away[curr]);
q.push({away[next],next});
}
}
}
return away[finish];
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cin>>n>>m;
int ai,bi,wi;
for(int i=0;i<m;i++)
{
cin>>ai>>bi>>wi;
if(a>b) swap(a,b);
is[ai][bi]=1;
edges[ai].push_back({bi,wi});
edges[bi].push_back({ai,wi});
}
cin>>k;
for(int i=0;i<k;i++)
{
int npp1;
cin>>npp1;
is_npp[npp1]=true;
npp.push_back(npp1);
}
dijkstra();
cin>>q;
int si,ti;
for(int i=0;i<q;i++)
{
cin>>si>>ti;
if(is_npp[si]==true || is_npp[ti]==true) {printf("0\n");continue;}
if(si>ti) swap(si,ti);
if(is[{si,ti}]) {printf("%lld\n",min(sp[si],sp[ti]));continue;}
printf("%lld\n",dijkstra(si,ti));
}
}