// ---------- 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,
        k: i32,
        a: [i32; n],
    }
    let calc = |l: &[i32], r: &[i32]| -> usize {
        let mut map = std::collections::HashMap::new();
        let mut min = std::i32::MAX;
        let mut cnt = 0;
        let mut x = 0;
        let mut ans = 0;
        for (i, &r) in r.iter().enumerate() {
            if min > r {
                min = r;
                cnt = 1;
            } else if min == r {
                cnt += 1;
            }
            while l.get(x).map_or(false, |l| *l > min) {
                let po = map.entry(l[x]).or_insert((0, 0));
                po.0 += 1;
                po.1 += x + 1;
                x += 1;
            }
            if cnt == 1 {
                if let Some(po) = map.get(&(k - r)) {
                    ans += po.0 * (i + 1) + po.1;
                }
            }
        }
        ans
    };
    let mut ans = 0;
    let mut a = a;
    let mut dfs = vec![a.as_mut_slice()];
    while let Some(a) = dfs.pop() {
        if a.len() == 1 {
            if a[0] * 2 == k {
                ans += 1;
            }
            continue;
        }
        let m = a.len() / 2;
        let (l, r) = a.split_at_mut(m);
        l.reverse();
        ans += calc(l, r) + calc(r, l);
        dfs.push(l);
        dfs.push(r);
    }
    println!("{}", ans);
}

fn main() {
    run();
}