没有TLE , 但是除了#1#3全WA了
求助谢谢
#include<iostream>
#include<vector>
#include<queue>
using namespace std;
const int MAXN=100005;
int vis[MAXN];
vector<int>e[MAXN],g[MAXN];
int price[MAXN];
int d[MAXN],h[MAXN];
queue<int>pq;
void dijkstra(int n,int s)
{
for(int i=1;i<=n;i++)
d[i]=price[i],vis[i]=false;
d[s]=price[s];
pq.push(s);
while(!pq.empty())
{
int u=pq.front();
pq.pop();
if(vis[u])
continue;
vis[u]=1;
for(int i=0;i<e[u].size();i++)
{
int v=e[u][i];
d[v]=min(price[v],d[u]);
pq.push(v);
}
}
}
void _dihkstra(int n,int s)
{
for(int i=1;i<=n;i++)
h[i]=price[i],vis[i]=false;
h[s]=price[s];
pq.push(s);
while(!pq.empty())
{
int u=pq.front();
pq.pop();
if(vis[u])
continue;
vis[u]=1;
for(int i=0;i<g[u].size();i++)
{
int v=g[u][i];
h[v]=max(price[v],h[u]);
pq.push(v);
}
}
}
int main()
{
int n,m;
cin>>n>>m;
for(int i=1;i<=n;i++)
cin>>price[i];
for(int i=1;i<=m;i++)
{
int u,v,f;
cin>>u>>v>>f;
e[u].push_back(v);
g[u].push_back(v);
if(f==2)
{
e[v].push_back(u);
g[v].push_back(u);
}
}
dijkstra(n, 1);
_dihkstra(n, n);
int ans=-1;
//for(int i=1;i<=n;i++)
// cout<<d[i]<<" ";
//cout<<endl;
//for(int i=1;i<=n;i++)
// cout<<h[i]<<" ";
//cout<<endl;
for(int i=1;i<=n;i++)
ans=max(h[i]-d[i],ans);
cout<<ans<<endl;
return 0;
}