#![allow(unused_imports)]
use std::cmp::*;
use std::collections::*;

fn main() {
    let n = read::<usize>();
    let mut edges = vec![vec![]; n];
    let mut rev_edges = vec![vec![]; n];
    for i in 0..n - 1 {
        let v = read_vec::<usize>();
        let (a, b) = (v[0] - 1, v[1] - 1);
        edges[a].push(b);
        rev_edges[b].push(a);
    }
    let root = (0..n).find(|&x| rev_edges[x].is_empty()).unwrap();
    let mut pre_order = vec![];
    dfs(root, &edges, &mut pre_order);
    pre_order.reverse();

    let mut count = vec![0; n];
    let mut dp = vec![0; n];
    for ti in pre_order {
        if edges[ti].is_empty() {
            continue;
        }
        for &ci in &edges[ti] {
            count[ti] += 1 + count[ci];
            dp[ti] += dp[ci];
        }
        dp[ti] += count[ti];
    }

    let ans = dp.iter().sum::<i64>();
    println!("{}", ans);
}

fn dfs(cur: usize, edges: &Vec<Vec<usize>>, pre_order: &mut Vec<usize>) {
    pre_order.push(cur);
    for &to in edges[cur].iter() {
        dfs(to, edges, pre_order);
    }
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}