N = int(input())
G = [[] for i in range(N)]
for i in range(N - 1):
    u, v = map(int, input().split())
    u, v = u - 1, v - 1
    G[u].append(v)
    G[v].append(u)
    
ans = N - 1
for i in range(N):
    ans += len(G[i]) * (len(G[i]) - 1) // 2
    for u in G[i]:
        ans += (len(G[u]) - 1) * (len(G[i]) - 1) / 2
        
print(int(ans))