n = int(input())
D = [0 for _ in range(n)]
for _ in range(n - 1):
    a, b = map(int, input().split())
    D[a - 1] += 1
    D[b - 1] += 1
ans = 0
for i in range(n):
    if D[i] == 1:
        ans += 1
print(ans - 2)