N=int(input())
G=[[] for i in range(N)]
for i in range(N-1):
  a,b=map(int,input().split())
  G[a-1].append(b-1)
  G[b-1].append(a-1)
from collections import deque
S=deque()
S.append(0)
dist=[-1]*N
dist[0]=0
root=[-1]*N
while S:
  x=S.pop()
  for y in G[x]:
    if dist[y]>=0:
      continue
    dist[y]=dist[x]+1
    root[y]=x
    S.append(y)
dp=[[0]*4 for i in range(N)]
L=[]
for i in range(N):
  L.append((dist[i],i))
L.sort(reverse=True)
result=0
for i in range(N):
  pos=L[i][1]
  for y in G[pos]:
    if dist[y]<dist[pos]:
      continue
    for j in range(3):
      dp[pos][j+1]+=dp[y][j]
  dp[pos][0]=1
for i in range(N):
  result+=sum(dp[i][1:4])
  M=len(G[i])
  v0=[0]*(len(G[i]))
  v1=[0]*M
  for j in range(M):
    y=G[i][j]
    if dist[y]<dist[i]:
      continue
    v0[j]+=dp[y][0]
    v1[j]+=dp[y][1]
  for j in range(1,M):
    v0[j]+=v0[j-1]
    v1[j]+=v1[j-1]
  for j in range(1,M):
    y=G[i][j]
    if dist[y]<dist[i]:
      continue
    result+=dp[y][0]*(v0[j-1]+v1[j-1])
    result+=dp[y][1]*(v0[j-1])
print(result)