def Map():
  return list(map(int,input().split()))

N = int(input())
G = [[] for i in range(N)]
D = [0 for i in range(N)]
for i in range(N-1):
  u,v = Map()
  u -= 1
  v -= 1
  D[u] += 1
  D[v] += 1
  G[u].append(v)
  G[v].append(u)

D_2 = [0 for i in range(N)]
for u in range(N):
  for v in G[u]:
    D_2[u] += D[v] - 1
D_3 = [0 for i in range(N)]
for u in range(N):
  for v in G[u]:
    D_3[u] += D_2[v] - (D[u] - 1)
ans = 0
for u in range(N):
  ans += D[u] + D_2[u] + D_3[u]
print(ans//2)