N=int(input())
G=[[] for _ in range(N)]
for _ in range(N-1):
    u,v=map(int,input().split())
    G[u-1].append(v-1)
    G[v-1].append(u-1)
Two=[0]*N
ans=0
for i in range(N):
    ans+=len(G[i])
    for q in G[i]:
        Two[i]+=(len(G[q])-1)
for i in range(N):
    ans+=Two[i]
    for q in G[i]:
        ans+=Two[q]
        ans-=(len(G[i])-1)

print(ans//2)