【SCOI2005】【BZOJ1083】繁忙的都市(MST模板)
problem
给定一张图,求其最小生成树中的边数和权值最大的边
solution
裸的Kruskal
codes
#include<iostream>
#include<algorithm>
using namespace std;
const int maxn = 10010;
struct Edge{int u, v, w;}e[maxn];
bool cmp(Edge a, Edge b){return a.w<b.w;}
int fa[maxn];
int find(int x){return x==fa[x]?x:fa[x]=find(fa[x]);}
int init(int n){for(int i = 1; i <= n; i++)fa[i]=i;}
int main(){
int n, m; cin>>n>>m;
for(int i = 1; i <= m; i++)
cin>>e[i].u>>e[i].v>>e[i].w;
sort(e+1,e+m+1,cmp);
init(n);
int ans1=0, ans2=-1;
for(int i = 1; i <= m; i++){
if(find(e[i].u)!=find(e[i].v)){
fa[find(e[i].u)] = find(e[i].v);
ans1++;
ans2 = max(ans2, e[i].w);
}
}
cout<<ans1<<' '<<ans2<<'\n';
return 0;
}