Cod sursa(job #1740558)
Utilizator | Konoplyanka Konoplyanka | Data | 11 august 2016 18:54:57 |
---|---|---|---|
Problema | PScNv | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.61 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream f("pscnv.in");
ofstream g("pscnv.out");
struct pt
{
int x,y,c;
}v[1<<19];
int i,n,m,x,y,G[1<<18];
bool cmp(pt a,pt b)
{
return a.c<b.c;
}
int gr(int i)
{
if(i!=G[i]) G[i]=gr(G[i]);
return G[i];
}
int main()
{
f>>n>>m>>x>>y;
for(i=1;i<=m;++i) f>>v[i].x>>v[i].y>>v[i].c;
sort(v+1,v+m+1,cmp);
for(i=1;i<=n;++i) G[i]=i;
for(i=1;i<=m;++i)
{
if(gr(v[i].x)!=gr(v[i].y))
G[v[i].x]=v[i].y;
if(gr(x)==gr(y))
{
g<<v[i].c;
return 0;
}
}
}