import sys

sys.setrecursionlimit(500000)
def input():
    return sys.stdin.readline()[:-1]


N = int(input())
e_list = [[] for i in range(N)]
for i in range(N-1):
    u,v = list(map(int,input().split()))
    u,v = u-1,v-1
    e_list[u].append(v)
    e_list[v].append(u)

depth = [0]*N
par = [-1]*N
chnum = [0]*N

ans = 0
def dfs(v):
    global ans
    ccsum = 0
    for v1 in e_list[v]:
        if par[v] != v1:
            depth[v1] = depth[v] + 1
            par[v1] = v
            chnum[v] += 1
            ans += 1
            dfs(v1)
            ccsum += chnum[v1]
    for v1 in e_list[v]:
        if par[v] != v1:
            ans += ccsum - chnum[v1]         
    ans += chnum[v] * (chnum[v] - 1) // 2
    ans += ccsum    
    if depth[v] >= 3:
        ans += 1
dfs(0)
print(ans)