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