use std::io::*;
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 t: usize = itr.next().unwrap().parse().unwrap();
    for _ in 0..t {
        let n: usize = itr.next().unwrap().parse().unwrap();
        let a: Vec<usize> = (0..n * 2)
            .map(|_| itr.next().unwrap().parse().unwrap())
            .collect();
        let mut ok = true;
        for i in 0..n * 2 {
            let mut cnt = vec![0; n + 1];
            for j in i + 1..n * 2 {
                if a[j] < a[i] {
                    cnt[a[j]] += 1;
                }
            }
            for j in 1..=n {
                ok &= cnt[j] <= 1;
            }
        }
        if ok {
            println!("Yes");
        } else {
            println!("No");
        }
    }
}