N=int(input())
e=[list(map(lambda x: int(x)-1,input().split())) for i in range(N-1)]
v=[0 for i in range(N)]
for i in range(N-1):
    v[e[i][0]]+=1
    v[e[i][1]]+=1
ans = N-1 # distance=1
for i in range(N): #distance=2
    ans+=v[i]*(v[i]-1)//2
for i in range(N-1): #distance=3
  ans+=(v[e[i][0]]-1)*(v[e[i][1]]-1)
print(ans)