import sequtils,times
template times*(n:int,body) = (for _ in 0..<n: body)
template `max=`*(x,y) = x = max(x,y)
template `min=`*(x,y) = x = min(x,y)
template stopwatch(body) = (let t1 = cpuTime();body;echo "TIME:",(cpuTime() - t1) * 1000,"ms")
proc getchar_unlocked():char {. importc:"getchar_unlocked",header: "<stdio.h>" .}
proc scan(): int =
  while true:
    let k = getchar_unlocked()
    if k < '0': return
    result = 10 * result + k.ord - '0'.ord

let n = scan()
var E = newSeqWith(n,newSeq[int]())
(n-1).times:
  let u = scan() - 1
  let v = scan() - 1
  E[u] &= v
  E[v] &= u

var preHasCutDP = newSeqWith(n,-1)
var preHasNotCutDP = newSeqWith(n,-1)
var time = 0
proc solve(preHasCut:bool,x:int,preX:int):int =
  if E[x].len == 0 : return if preHasCut: 1 else: 0
  if preHasCut and preHasCutDP[x] != -1 : return preHasCutDP[x]
  if not preHasCut and preHasNotCutDP[x] != -1 : return preHasNotCutDP[x]
  time += 1
  var whenCut = 0
  for e in E[x]:
    if e != preX : whenCut += solve(true,e,x)
  var whenNotCut = 0
  for e in E[x]:
    if e != preX : whenNotCut += solve(false,e,x)
  preHasCutDP[x] = max(whenCut,whenNotCut+1)
  preHasNotCutDP[x] = max(whenCut,whenNotCut)
  if preHasCut : whenNotCut += 1
  result = max(whenCut,whenNotCut)


echo solve(true,0,-1)