N = int(input())
E = [input().split(' ') for i in range(N - 1)]
d = {}
for e in E:
    d[e[0]] = d[e[0]] + 1 if e[0] in d else 1
    d[e[1]] = d[e[1]] + 1 if e[1] in d else 1

print(sum([max(d[x] -2 , 0) for x in d.keys()]))