N = int(input())
jisu = [0]*N
UV = []
for i in range(N - 1):
    u, v = map(int, input().split())
    u -= 1
    v -= 1
    jisu[u] += 1
    jisu[v] += 1
    UV.append((u, v))

ans = 0

# 距離1
ans += N - 1

# 距離2
for i in range(N):
    c = jisu[i]
    ans += c*(c - 1)//2

# 距離3
for u, v in UV:
    c1, c2 = jisu[u], jisu[v]
    ans += (c1 - 1)*(c2 - 1)

print(ans)