按要求建圖,然後貪心排序跑最小生成樹:
#include <queue>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#define ll long long
#define rep(i,x,y) for(ll i=(x);i<=(y);i++)
#define repl(i,x,y) for(ll i=(x);i<(y);i++)
#define repd(i,x,y) for(ll i=(x);i>=(y);i--)
using namespace std;
const ll N=1e5+5;
const ll M=2e6+5;
const ll Inf=1e18;
ll n,m,ans,tot,h[N],f[N],vis[N];
ll cnt,to[M],nxt[M],edge[M],head[M];
struct node {
ll x,y,z;
}G[M];
inline ll read() {
ll x=0;char ch=getchar();bool f=0;
while(ch>'9'||ch<'0'){if(ch=='-')f=1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=(x<<1)+(x<<3)+ch-'0';ch=getchar();}
return f?-x:x;
}
void ins(ll x,ll y,ll z) {
++cnt;G[cnt].x=x,G[cnt].y=y,G[cnt].z=z;
to[cnt]=y;edge[cnt]=z;nxt[cnt]=head[x];head[x]=cnt;
}
void dfs(ll x) {
if(vis[x]) return ;++tot;vis[x]=1;
for(ll i=head[x];i;i=nxt[i]) dfs(to[i]);
}
bool cmp(node p,node q) {
return h[p.y]==h[q.y]?p.z<q.z:h[p.y]>h[q.y];
}
ll find(ll x) {
return f[x]==x?x:f[x]=find(f[x]);
}
int main() {
n=read(),m=read();
rep(i,1,n) h[i]=read();
rep(i,1,m) {
ll x=read(),y=read(),z=read();
if(h[x]>=h[y]) ins(x,y,z);
if(h[y]>=h[x]) ins(y,x,z);
}
dfs(1);printf("%lld ",tot);
sort(G+1,G+1+cnt,cmp);
rep(i,1,n) f[i]=i;
rep(i,1,cnt) {
ll x=G[i].x,y=G[i].y;
if(!vis[x]||!vis[y]) continue;
ll fx=find(x),fy=find(y);
if(fx!=fy) {
f[fx]=fy,ans+=G[i].z;
}
}
printf("%lld",ans);
return 0;
}