N=int(input())
degs=[0 for _ in range(N)]
UV=[]
for _ in range(N-1):
    u,v=map(int,input().split())
    u-=1
    v-=1
    UV.append((u,v))
    degs[u]+=1
    degs[v]+=1

ans=N-1
for i in range(N):
    ans+=degs[i]*(degs[i]-1)//2
for (u,v) in UV:
    ans+=(degs[u]-1)*(degs[v]-1)
print(ans)