import sys
input = lambda: sys.stdin.readline().rstrip()
sys.setrecursionlimit(10**6)
import pypyjit
pypyjit.set_param('max_unroll_recursion=-1')

##################

n = int(input())
G = [[] for _ in range(n)]
for _ in range(n-1):
  u, v = map(int, input().split())
  u -= 1
  v -= 1
  G[u].append(v)
  G[v].append(u)

dp = [[0, 0] for _ in range(n)]

def dfs(p, v):
  ch0, ch1 = 0, 0
  for x in G[v]:
    if x == p:
      continue
    dfs(v, x)
    ch0 += max(dp[x][0], dp[x][1])
    ch1 += max(dp[x][0], dp[x][1]-1)
  dp[v][0] = ch0
  dp[v][1] = ch1 + 1

dfs(-1, 0)
# print(*dp)
print(max(dp[0]))