from collections import deque N = int(input()) E = [[] for _ in range(N)] for _ in range(N-1): u,v = map(int, input().split()) E[u-1].append(v-1) E[v-1].append(u-1) parent = [-1]*N used = [-1]*N q = deque() q.append(0) used[0] = 0 while q: u = q.popleft() for v in E[u]: if used[v] >= 0: continue q.append(v) parent[v] = u used[v] = used[u]+1 num = [0]*N for i in range(N): used[i] = (used[i], i) used.sort(reverse=True) for u in used: if u[1] == 0: continue num[parent[u[1]]] += num[u[1]]+1 for i in range(N): ans = 2*num[i]+1 cnt = 0 for v in E[i]: if parent[i] == v: continue cnt += 1 ans += cnt*(cnt-1) for v in E[i]: if parent[i] == v: continue ans += 2*num[v]*(cnt-1) print(ans)