import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

N = int(input())
edge = [[] for _ in range(N)]
for _ in range(N - 1):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    edge[a].append(b)
    edge[b].append(a)

topo = []
par = [-1] * N
q = [0]
while q:
    s = q.pop()
    topo.append(s)
    for t in edge[s]:
        if t == par[s]:
            continue
        par[t] = s
        q.append(t)
        edge[t].remove(s)


ans = N * N
size = [1] * N
for s in topo[::-1]:
    tmp = N - 1
    for c in edge[s]:
        ans += (N - size[c]) * size[c]
        tmp -= size[c]
    ans += size[s] * tmp
    size[par[s]] += size[s]

print(ans)