N=int(input())
edges=[[int(j) for j in input().split()] for i in range(N-1)]

cnts=[0 for i in range(N+1)]
for edge in edges:
    cnts[edge[0]]+=1
    cnts[edge[1]]+=1

solo=0
for cnt in cnts:
    if cnt==1:
        solo+=1
print(solo-2)