def root(d, x)
  d[x]<0?x:(d[x]=root d,d[x])
end

n=read_line.to_i
d=[-1]*n
ans=""
STDIN.each_line{|s|
  a,b,c=s.split
  a,b=root(d,a.to_i-1),root(d,b.to_i-1)
  next if a==b
  a,b=b,a if d[a]>d[b]
  d[a],d[b],ans=d[a]+d[b],a,c
}
puts ans