n = int(input())
u = [0] * (n-1)
v = [0] * (n-1)
deg = [0] * n
for i in range(n-1):
	u[i], v[i] = map(int,input().split())
	u[i] -= 1
	v[i] -= 1
	deg[u[i]] += 1
	deg[v[i]] += 1

ans = n-1
for i in range(n-1):
	ans += (deg[u[i]] - 1) * (deg[v[i]] - 1)
for i in range(n):
	ans += deg[i] * (deg[i] - 1) // 2

print(ans)