import sys
input = lambda : sys.stdin.readline().rstrip()

sys.setrecursionlimit(2*10**5+10)
write = lambda x: sys.stdout.write(x+"\n")
debug = lambda x: sys.stderr.write(x+"\n")
writef = lambda x: print("{:.12f}".format(x))

### 木の読み込み yomikomi
n = int(input())
ns = [[] for _ in range(n)]
for _ in range(n-1):
    u,v = map(int, input().split())
    u -= 1
    v -= 1
    ns[u].append(v)
    ns[v].append(u)
    
cs = [0]*n
q = [0]
cs[0] = 1
while q:
    u = q.pop()
    for v in ns[u]:
        if cs[v]>0:
            continue
        cs[v] = 3 - cs[u]
        q.append(v)
val = sum((v==1 for v in cs))
ans = min(val, n-val)
print(ans)