fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: Vec<isize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    let mut lsum = vec![0usize; n];
    let mut rsum = vec![0usize; n+1];
    for i in 0..n-1 {
        lsum[i+1] = lsum[i] + if a[i] < a[i+1] { 1 } else { 0 };
    }
    for i in (1..n).rev() {
        rsum[i] = rsum[i+1] + if a[i-1] > a[i] { 1 } else { 0 };
    }
    let mut result = 0usize;
    for i in 0..n {
        result += lsum[i].min(rsum[i+1]);
    }
    println!("{}", result);
}