N = int(input())
edge = [[] for _ in range(N)]
edge_list = []
for _ in range(N-1):
    u,v = list(map(int,input().split()))
    u -= 1;v -= 1
    edge[u].append(v)
    edge[v].append(u)
    edge_list.append((u,v))

ans = N-1
for i in range(N):
    ans += len(edge[i]) * (len(edge[i]) - 1) // 2

for u,v in edge_list:
    ans += (len(edge[u]) - 1) * (len(edge[v]) - 1)

print(ans)