AC了,但觉得这像最小生成树,问一问:
#include <algorithm>
#include <iostream>
#include <string>
using namespace std;
struct xyt
{
int x,y,t;
};
xyt XT[200005];
int n,m,father[1005],fx,fy,ans,num;
bool cmp(xyt LZY,xyt XSE)
{
return LZY.t<XSE.t;
}
int find(int x)
{
if(x==father[x])
{
return x;
}
return father[x]=find(father[x]);
}
void join(int x,int y)
{
fx=find(x);
fy=find(y);
father[fy]=fx;
}
int main()
{
cin >> n >> m;
for(int i=0;i<=n;i++)
{
father[i]=i;
}
for(int i=0;i<m;i++)
{
cin >> XT[i].x >> XT[i].y >> XT[i].t;
}
sort(XT,XT+m,cmp);
for(int i=0;i<m;i++)
{
fx=find(XT[i].x);
fy=find(XT[i].y);
if(fx!=fy)
{
father[fy]=fx;
n--;
}
if(n==1)
{
cout << XT[i].t;
return 0;
}
}
cout << -1;
return 0;
}
它算最小生成树算法吗?