N = int(input())
E = [[] for i in range(N)]
for i in range(N-1):
  u,v = map(int,input().split())
  E[u-1].append(v-1)
  E[v-1].append(u-1)

Q = [0]
C = [-1] * N
L = [[],[]]
C[0] = 0
L[0].append(0)
for p in Q:
  for e in E[p]:
    if C[e] == -1:
      Q.append(e)
      C[e] = 1 - C[p]
      L[C[e]].append(e)

print(min(len(L[0]),len(L[1])))