import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N = int(readline())
m = map(int,read().split())
AB = zip(m,m)

deg = [0] * (N+1)
for a,b in AB:
    deg[a] += 1
    deg[b] += 1

leaf = sum(x == 1 for x in deg)

answer = leaf - 2
print(answer)