n = int(input())
E = []
C = [0 for _ in range(n)]
for _ in range(n - 1):
    u, v = map(int, input().split())
    u -= 1
    v -= 1
    C[u] += 1
    C[v] += 1
    E.append((u, v))
ans = n - 1
for i in range(n):
    ans += C[i] * (C[i] - 1) // 2
for i in range(n - 1):
    u, v = E[i]
    ans += (C[u] - 1) * (C[v] - 1)
print(ans)