N = int(input())
T = [[] for i in range(N)]
for i in range(N - 1):
    u, v = map(int, input().split())
    u, v = u - 1, v - 1
    T[u].append(v)
    T[v].append(u)


ans = 0
for i, tos in enumerate(T):
    if len(tos) == 1:
        continue

    ans += len(tos) - 2

print(ans)