from functools import cache

@cache
def black(v, p):
    ans = 1
    for u in con[v]:
        if u == p:
            continue
        ans += white(u, v)
    return ans

@cache
def white(v, p):
    ans = 0
    for u in con[v]:
        if u == p:
            continue
        ans += max(black(u, v), white(u, v))
    return ans

N = int(input())
con = [set() for i in range(N)]
for i in range(N - 1):
    a, b = map(int, input().split())
    con[a - 1].add(b - 1)
    con[b - 1].add(a - 1)

ans = float('inf')
for i in range(N):
    temp = 1
    for u in con[i]:
        temp += white(u, i)
    ans = min(ans, temp)
print(ans)