题目链接
http://acm.hdu.edu.cn/showproblem.php?pid=1233
题目很简单(最小生成树)
#include<cstdio>
#include<iostream>
#include<algorithm>
using namespace std;
struct node
{
int x,y,d;
}s[5000];
int father[111];
int sum;
bool cmp(const node &a,const node &b)
{
return a.d<b.d;
}
int Find(int x)
{
if(x==father[x]) return x;
father[x]=Find(father[x]);
return father[x];
}
void Union(int x,int y,int d)
{
x=Find(x);
y=Find(y);
if(x!=y)
{
father[x]=y;
sum=sum+d;
}
}
int main(void)
{
int n,m,i,j,k,l;
while(scanf("%d",&n)==1&&n)
{
m=n*(n-1)/2;
for(i=0;i<m;i++)
scanf("%d%d%d",&s[i].x,&s[i].y,&s[i].d);
sort(s,s+m,cmp);
for(i=1;i<=n;i++)
father[i]=i;
sum=0;
for(i=0;i<m;i++)
{
Union(s[i].x,s[i].y,s[i].d);
}
printf("%d
",sum);
}
return 0;
}