use std::io::*;

fn dfs(v: usize, p: usize, ans: &mut usize, g: &Vec<Vec<usize>>) -> usize {
    let mut sz = 1;
    for &nv in g[v].iter() {
        if nv != p {
            let nsz = dfs(nv, v, ans, g);
            *ans += nsz * (g.len() - nsz);
            sz += nsz;
        }
    }
    *ans += sz * (g.len() - sz);
    sz
}
fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();
    let mut g: Vec<Vec<usize>> = vec![Vec::new(); n];
    for _ in 0..n - 1 {
        let a: usize = itr.next().unwrap().parse::<usize>().unwrap() - 1;
        let b: usize = itr.next().unwrap().parse::<usize>().unwrap() - 1;
        g[a].push(b);
        g[b].push(a);
    }
    let mut ans = 0;
    dfs(0, 0, &mut ans, &g);
    println!("{}", ans + n * n);
}