fn solve() {
    let (a, b, c): (usize, usize, usize) = (read(), read(), read());
    println!("{:?}", a + b + c);
    let s: String = read();
    println!("{:?}", s);
}

fn dfs(u: usize, p: usize, adjl: &Vec<Vec<usize>>, dp: &mut Vec<Vec<usize>>) {
    let mut leaf = true;
    // 残した時に消える個数
    for &v in &adjl[u] {
        if v == p {
            continue;
        }
        leaf = false;
        dfs(v, u, adjl, dp);
        // 残した方が良い子を数える.
        dp[0][u] += max(dp[0][v] - 1, dp[1][v]);
        dp[1][u] += max(dp[0][v], dp[1][v]);
    }
}

fn main() {
    let n = read();
    let mut adjl: Vec<Vec<usize>> = vec![vec![]; n];
    for _ in 0..n - 1 {
        let (mut x, mut y): (usize, usize) = (read::<usize>(), read::<usize>());
        x -= 1;
        y -= 1;
        adjl[x].push(y);
        adjl[y].push(x);
    }
    // dp[0][i] ... i番目を消す
    // dp[1][u] ... 1番目を残す
    let mut dp = vec![vec![0; n]; 2];
    for i in 0..n {
        dp[0][i] = 1;
    }
    dfs(0, 0, &adjl, &mut dp);
    println!("{}", max(dp[0][0], dp[1][0]));
}

// =========
#[allow(unused_imports)]
use std::cmp::{max, min, Reverse};
#[allow(unused_imports)]
use std::collections::{BinaryHeap, HashMap, HashSet};
#[allow(unused_imports)]
use std::process::exit;

#[allow(dead_code)]
const MOD: usize = 1000000007;

fn read<T: std::str::FromStr>() -> T {
    use std::io::Read;
    let stdin = std::io::stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}

// =========