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
print(N-1+sum([v[i]*(v[i]-1)//2 for i in range(N)])+sum([(v[e[i][0]]-1)*(v[e[i][1]]-1)for i in range(N-1)]))