N=int(input())
edges=[list(map(int,input().split())) for _ in range(N-1)]
f={}
for a,b in edges:
    f[a]=f.get(a,[])+[b]
    f[b]=f.get(b,[])+[a]
g=sorted([len(v) for v in f.values()])
r=0
for v in g[2:]:
    if v>2:r+=v-2
print(r)