import itertools
N=int(input())
e=[list(map(lambda x: int(x)-1,input().split())) for i in range(N-1)]
q=list(itertools.chain.from_iterable(e))
v=[q.count(i) for i in range(N)]
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)]))