import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
A=[0]*n
for _ in range(n-1):
  a,b=map(int,input().split())
  A[a-1]+=1
  A[b-1]+=1
ans=0
for i in range(n):
  if A[i]==1:
    ans+=1
print(ans-2)