#![allow(non_snake_case, unused_imports, unused_must_use)]
use std::io::{self, prelude::*};
use std::str;

fn main() {
    let (stdin, stdout) = (io::stdin(), io::stdout());
    let mut scan = Scanner::new(stdin.lock());
    let mut out = io::BufWriter::new(stdout.lock());

    macro_rules! input {
        ($T: ty) => {
            scan.token::<$T>()
        };
        ($T: ty, $N: expr) => {
            (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
        };
    }

    let N = input!(usize);

    let mut graph = vec![vec![]; N];

    for _ in 0..N - 1 {
        let (u, v) = (input!(usize) - 1, input!(usize) - 1);
        graph[u].push(v);
        graph[v].push(u);
    }

    let r = 0;

    let mut dist = vec![0; N];
    let mut seen = vec![false; N];

    let mut q = std::collections::VecDeque::new();
    q.push_back(r);
    seen[r] = true;

    while let Some(now) = q.pop_front() {
        for &nxt in graph[now].iter() {
            if seen[nxt] {
                continue;
            }

            q.push_back(nxt);
            dist[nxt] = dist[now] + 1;
            seen[nxt] = true;
        }
    }

    let mut ans = 0;

    let mut dp1 = vec![0; N];
    let mut dp2 = vec![0; N];
    let mut dp3 = vec![0; N];

    let mut order = (0..N).map(|i| i).collect::<Vec<_>>();
    order.sort_by_key(|&i| dist[i]);
    order.reverse();

    for v in order {
        if v != r {
            dp1[v] = graph[v].len() - 1;
        } else {
            dp1[v] = graph[v].len();
        }

        for &nxt in graph[v].iter() {
            if dist[nxt] <= dist[v] {
                continue;
            }

            dp2[v] += dp1[nxt];
            dp3[v] += dp2[nxt];
        }

        ans += dp1[v] + dp2[v] + dp3[v];

        if dp1[v] != 0 {
            ans += (dp1[v] - 1) * dp2[v] + (dp1[v] - 1) * dp1[v] / 2;
        }
    }

    writeln!(out, "{}", ans);
}

struct Scanner<R> {
    reader: R,
    buf_str: Vec<u8>,
    buf_iter: str::SplitWhitespace<'static>,
}
impl<R: BufRead> Scanner<R> {
    fn new(reader: R) -> Self {
        Self {
            reader,
            buf_str: vec![],
            buf_iter: "".split_whitespace(),
        }
    }
    fn token<T: str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buf_iter.next() {
                return token.parse().ok().expect("Failed parse");
            }
            self.buf_str.clear();
            self.reader
                .read_until(b'\n', &mut self.buf_str)
                .expect("Failed read");
            self.buf_iter = unsafe {
                let slice = str::from_utf8_unchecked(&self.buf_str);
                std::mem::transmute(slice.split_whitespace())
            }
        }
    }
}