N = int(input())
E = []
G = {i:[] for i in range(1,N+1)}
for _ in range(N-1):
    u,v = map(int, input().split())
    E.append((u,v))
    G[u].append(v)
    G[v].append(u)
ans = N-1
for i in range(1,N+1):
    ans += len(G[i])*(len(G[i])-1)//2
for u,v in E:
    ans += (len(G[u])-1)*(len(G[v])-1)
print(ans)