#![allow(non_snake_case, unused_imports)]

use std::collections::{BinaryHeap, HashMap, HashSet};
use proconio::{input, marker::Usize1, marker::Chars};
use itertools::Itertools;

#[allow(unused_macros)]
macro_rules! d {
    ( $( $x:expr ),* $(,)? ) => {
        eprintln!(
            concat!( $( stringify!($x), "={:?} " ),* ),
            $( $x ),*
        );
    };
}

#[allow(dead_code)]
fn yn(b: bool) -> &'static str {
    if b { "Yes" } else { "No" }
}

fn solve() -> bool {
    input! {
        N: usize,
        H: [i64; N],
    }

    #[derive(Debug, PartialEq, Eq)]
    enum E {
        Up,
        Down,
    }

    let a = H.iter()
        .tuple_windows::<(_, _)>()
        .map(|(a, b)| {
            if a < b { E::Up } else { E::Down }
        })
        .dedup()
        .collect_vec();

    let ok = match a.as_slice() {
        [E::Down, E::Up, E::Down, E::Up] => true,
        _ => false,
    };
    ok
}

fn main() {
    input! {
        T: usize,
    }

    for _ in 0..T {
        let ans = solve();
        println!("{}", yn(ans));
    }
}