import sys
input=sys.stdin.buffer.readline

n,K=map(int,input().split())
e=[[] for i in range(n)]
for _ in range(n-1):
  a,b,c=map(int,input().split())
  a-=1
  b-=1
  c-=1
  e[a]+=[(b,c)]
  e[b]+=[(a,c)]

def CD(e):
  c=[]
  p=[-1]*n
  d=[0]*n
  v=[0]*n
  u=[0]*n
  sq=[(0,n)]
  for start,W in sq:
    q=[start]
    d[start]=0
    while len(q)>0:
      s=q[-1]
      if v[s]==0:
        v[s]=1
        for t,_ in e[s]:
          if v[t]==0 and p[t]==-1:
            q+=[t]
            d[t]=d[s]+1
      else:
        u[s]=1+sum(u[t] for t,_ in e[s] if v[t]==0 and p[t]==-1)
        if all((W-u[t]>=u[t]) if v[t]==0 else (u[s]>=W-u[s]) for t,_ in e[s] if p[t]==-1):
          nc=s
        v[s]=0
        q.pop()
    p[nc]=len(c)
    c+=[nc]
    sq+=[(t,u[t]) if d[t]>d[nc] else (t,W-u[nc]) for t,_ in e[nc] if p[t]==-1]
  return c,p

cdc,cdp=CD(e)

exit()