// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------

fn run() {
    input! {
        n: usize,
        a: [u32; n],
    }
    let mut a = a;
    let mut b = a.clone();
    b.sort();
    let mut len = n;
    while len > 0 && a[len - 1] == b[len - 1] {
        len -= 1;
        a.pop();
        b.pop();
    }
    if a.is_empty() {
        println!("0");
        return;
    }
    let a = a.iter().cloned().cycle().take(2 * len).collect::<Vec<_>>();
    let mut cnt = a.windows(2).map(|a| (a[0] <= a[1]) as usize).collect::<Vec<_>>();
    cnt.push(0);
    for i in (0..(cnt.len() - 1)).rev() {
        cnt[i] += cnt[i + 1];
    }
    let mut elem = false;
    for i in 0..len {
        elem |= cnt[i] - cnt[i + len - 1] == len - 1;
    }
    let ans = 1 + !elem as usize;
    println!("{}", ans);
}

fn main() {
    run();
}