/*
     ><>   魚fishに癒されたい(><)  ><>
        >><>   ><>          ><>     ><>
    ><>         ><>     >>><>><><<>    ><>><>
         ><>   ><>   ><>    ><>     >><<<>>>    ><>   ><>
            ><>   >><>    ^<>   v   ><>    ><>  ><>
     ><>     >><>>    ><> ><>   ^      ><>
        >><><>      ><>   ><>   v   ><>         ><>
     <>><<    <><   ><>   >>>>><<<<<<>>>>>>>
         ><      >><<>>> ><>  ><>  >><>> <><  ><> ><>  ><>   >>
     > <>  ><>   ><>      >>><<<>>>>>>   ><>   ><> ><>   ><   ><>
       ><>      ><><><>>>>><><>>>>   >><>  ><>   ><>
   ><>     <<>   <><  >><>>  ><>    ><> ><>
     ><>   ><> ><   (>< ><) ><>   ><>>  ^ <>   ><>   <><  ><>
  ><>    ><>    <<<><>   ><>   <><  ><> v ><>  <>< ><>　><> ><> ><>
     ><>    ><>  ><><>  ><>   ><>    >><<><>><>>><>  ><>>  >><>>
 */
#[allow(unused_imports)]
use std::{
    convert::{Infallible, TryFrom, TryInto as _}, fmt::{self, Debug, Display, Formatter,},
    fs::File, hash::{Hash, Hasher, BuildHasherDefault}, iter::{Product, Sum}, marker::PhantomData,
    ops::{Add, AddAssign, Sub, SubAssign, Div, DivAssign, Mul, MulAssign, Neg, RangeBounds},
    str::FromStr, sync::{atomic::{self, AtomicU32, AtomicU64}, Once},
    collections::{*, btree_set::Range, btree_map::Range as BTreeRange}, mem::{swap},
    cmp::{self, Reverse, Ordering, Eq, PartialEq, PartialOrd},
    thread::LocalKey, f64::consts::PI, time::Instant, cell::RefCell,
    io::{self, stdin, Read, read_to_string, BufWriter, BufReader, stdout, Write},
};
pub trait SortD{ fn sort_d(&mut self); }
impl<T: Ord> SortD for Vec<T>{ fn sort_d(&mut self) {
    self.sort_by(|u, v| v.cmp(&u));
} }
pub trait Mx{fn max(&self, rhs: Self)->Self;}
impl Mx for f64{ fn max(&self, rhs: Self)->Self{if *self < rhs{ rhs } else { *self } }}
pub trait Mi{ fn min(&self, rhs: Self)->Self; }
impl Mi for f64{ fn min(&self, rhs: Self)->Self{ if *self > rhs{ rhs } else { *self } } }
#[inline(always)]
pub fn gcd(mut a: i64, mut b: i64)->i64{if a==0{return b;}else if b==0{return a;}let l1 = a.trailing_zeros();let l2 = b.trailing_zeros();
a >>= l1; b >>= l2;while a!=b{let x = (a^b).trailing_zeros();if a<b{swap(&mut a, &mut b)}a = (a-b)>>x;}a << l1.min(l2)}
pub fn factorial_i64(n: usize)->(Vec<i64>, Vec<i64>){ 
    let mut res = vec![1; n+1];let mut inv = vec![1; n+1];for i in 0..n{ res[i+1] = (res[i]*(i+1)as i64)%MOD; }
    inv[n] = mod_inverse(res[n], MOD);for i in (0..n).rev(){ inv[i] = inv[i+1]*(i+1) as i64%MOD; }(res, inv) }
pub fn floor(a:i64, b:i64)->i64{let res=(a%b+b)%b;(a-res)/b}
pub fn modulo(a: i64, b: i64)->i64{(a%b+b)%b}
pub fn extended_gcd(a:i64,b:i64)->(i64,i64,i64)
{if b==0{(a,1,0)}else{let(g,x,y)=extended_gcd(b,a%b);(g,y,x-floor(a,b)*y)}}
pub fn mod_inverse(a:i64,m:i64)->i64{let(_,x,_) =extended_gcd(a,m);(x%m+m)%m}
pub fn comb(a: i64, b: i64, f: &Vec<(i64, i64)>)->i64{
    if a<b{return 0;}else if b==0 || a==b{ return 1; }
    else{let x=f[a as usize].0;
        let y=f[(a-b) as usize].1;let z=f[b as usize].1;return((x*y)%MOD)*z%MOD;}}
pub fn factorial(x: i64)->Vec<(i64, i64)>{
    let mut f=vec![(1i64,1i64),(1, 1)];let mut z = 1i64;
    let mut inv = vec![0; x as usize+10];inv[1] = 1;
    for i in 2..x+1{z=(z*i)%MOD;
        let w=(MOD-inv[(MOD%i)as usize]*(MOD/i)%MOD)%MOD;
        inv[i as usize] = w;
        f.push((z, (f[i as usize-1].1*w)%MOD));}return f;}
pub fn fast_mod_pow(mut x: i64,p: usize, m: i64)->i64{
    x %= m;
    let mut res=1;let mut t=x;let mut z=p;while z > 0{
        if z%2==1{res = (res*t)%m;}t = (t*t)%m;z /= 2; }res}
pub fn vec_out<T>(v: Vec<T>) where T: ToString{ println!("{}", v.iter().map(|x| x.to_string()).collect::<Vec<_>>().join(" ")); }
pub fn one_add_out<T>(v: Vec<usize>){println!("{}", v.iter().map(|x| (x+1).to_string()).collect::<Vec<_>>().join(" "));}
pub trait Chmax{
    fn chmax(&mut self, rhs: Self);
}
impl Chmax for i64{
    fn chmax(&mut self, rhs: Self) {
        *self = (*self).max(rhs)
    }
}
impl Chmax for i32{
    fn chmax(&mut self, rhs: Self) {
        *self = (*self).max(rhs)
    }
}
impl Chmax for f64{
    fn chmax(&mut self, rhs: Self) {
        *self = (*self).max(rhs)
    }
}
impl Chmax for usize{
    fn chmax(&mut self, rhs: Self) {
        *self = (*self).max(rhs)
    }
}
pub trait Chmin {
    fn chmin(&mut self, rhs: Self);
}
impl Chmin for i128{
    fn chmin(&mut self, rhs: Self) {
        *self = (*self).min(rhs)
    }
}
impl Chmin for i64{
    fn chmin(&mut self, rhs: Self) {
        *self = (*self).min(rhs)
    }
}
impl Chmin for i32{
    fn chmin(&mut self, rhs: Self) {
        *self = (*self).min(rhs)
    }
}
impl Chmin for f64{
    fn chmin(&mut self, rhs: Self) {
        *self = (*self).min(rhs)
    }
}
impl Chmin for usize{
    fn chmin(&mut self, rhs: Self) {
        *self = (*self).min(rhs)
    }
}
#[derive(Debug, Clone)]
pub struct Counter<T: Ord>{
    c: usize,
    map: BTreeMap<T, usize>,
}

impl<T: Copy+Ord> Counter<T>{
    pub fn new()->Self{
        Counter{
            c: 0,
            map: BTreeMap::new(),
        }
    }

    #[inline(always)]
    pub fn range<R>(&self, range: R)->BTreeRange<'_, T, usize> where R: RangeBounds<T>{
        self.map.range(range)
    }

    #[inline(always)]
    pub fn mi(&self)->Option<T>{
        if let Some((x, _)) = self.range(..).next(){
            Some(*x)
        } else {
            None
        }
    }

    #[inline(always)]
    pub fn mx(&self)->Option<T>{
        if let Some((x, _)) = self.range(..).next_back(){
            Some(*x)
        } else {
            None
        }
    }

    #[inline(always)]
    pub fn one_add(&mut self, x: T){
        *self.map.entry(x).or_insert(0) += 1;
        self.c += 1;
    }

    #[inline(always)]
    pub fn one_sub(&mut self, x: T){
        if !self.map.contains_key(&x){return}
        let e = self.map.entry(x).or_insert(0);
        *e = e.saturating_sub(1);
        if self.map[&x] <= 0{
            self.map.remove(&x);
        }
        self.c = self.c.saturating_sub(1);
    }

    #[inline(always)]
    pub fn one_update(&mut self, x: T, y: T){
        self.one_sub(x);
        self.one_add(y);
    }

    #[inline(always)]
    pub fn del(&mut self, x: T){
        self.c = self.c.saturating_sub(*self.map.get(&x).unwrap_or(&0));
        self.map.remove(&x);
    }

    #[inline(always)]
    pub fn add(&mut self, x: T, c: usize){
        *self.map.entry(x).or_insert(0) += c;
        self.c += c;
    }

    #[inline(always)]
    pub fn sub(&mut self, x: T, c: usize){
        let e = self.map.entry(x).or_insert(0);
        *e = e.saturating_sub(c);
        if self.map[&x] == 0{
            self.map.remove(&x);
        }
        self.c = self.c.saturating_sub(c);
    }

    #[inline(always)]
    pub fn include(&self, x: T)->bool{
        self.map.contains_key(&x)
    }

    #[inline(always)]
    pub fn cnt(&self, x: T)->usize{
        *self.map.get(&x).unwrap_or(&0)
    }

    #[inline(always)]
    pub fn is_empty(&self)->bool{
        self.map.is_empty()
    }

    #[inline(always)]
    pub fn len(&self)->usize{
        self.map.len()
    }

    #[inline(always)]
    pub fn clear(&mut self){
        self.map.clear();
        self.c = 0;
    }

    #[inline(always)]
    pub fn merge(&mut self, rhs: &mut Counter<T>){
        if self.len() < rhs.len(){
            swap(self, rhs);
        }
        for (&k, &v) in rhs.map.iter(){
            self.add(k, v);
        }
        rhs.clear();
    }
}
const MASK: usize = 63;
const BN: usize = 64;
const BB: usize = 6;

#[derive(Clone, Debug)]
pub struct BitSet{
    data: Vec<usize>,
}

impl PartialEq<&BitSet> for BitSet {
    fn eq(&self, other: &&BitSet) -> bool {
        self==other
    }
}

impl BitSet {
    #[inline]
    pub fn new(cap: usize) -> Self {
        BitSet{
            data: vec![0; (cap+MASK)>>BB],
        }
    }

    #[inline]
    pub fn build(base: Vec<usize>) -> Self {
        BitSet {
            data: base
        }
    }

    #[inline]
    pub fn set(&mut self, p: usize, f: bool){
        if f{
            self.data[p>>BB] |= 1<<(p&MASK);
        } else {
            self.data[p>>BB] &= !(1<<(p&MASK));
        }
    }

    #[inline]
    pub fn flip(&mut self, p: usize){
        self.data[p>>BB] ^= 1<<(p&MASK)
    }

    #[inline(always)]
    pub fn len(&self) -> usize {
        self.data.len()
    }

    #[inline(always)]
    pub fn get(&self, p: usize) -> bool {
        self.data[p>>BB] & (1 << (p&MASK)) != 0
    }

    #[inline]
    pub fn and(&self, rhs: &Self) -> Self {
        if self.len() < rhs.len() {
            let mut res = rhs.clone();
            for (i, &x) in self.data.iter().enumerate(){
                res.data[i] &= x;
            }
            res
        } else {
            let mut res = self.clone();
            for (i, &x) in rhs.data.iter().enumerate(){
                res.data[i] &= x;
            }
            res
        }
    }

    #[inline]
    pub fn or(&self, rhs: &Self) -> Self{
        if self.len() < rhs.len() {
            let mut res = rhs.clone();
            for (i, &x) in self.data.iter().enumerate(){
                res.data[i] |= x;
            }
            res
        } else {
            let mut res = self.clone();
            for (i, &x) in rhs.data.iter().enumerate(){
                res.data[i] |= x;
            }
            res
        }
    }

    #[inline]
    pub fn xor(&self, rhs: &Self) -> Self {
        if self.len() < rhs.len() {
            let mut res = rhs.clone();
            for (i, &x) in self.data.iter().enumerate(){
                res.data[i] ^= x;
            }
            res
        } else {
            let mut res = self.clone();
            for (i, &x) in rhs.data.iter().enumerate(){
                res.data[i] ^= x;
            }
            res
        }
    }

    // 配列上の左シフトです
    #[inline]
    pub fn get_shift_left(&self, k: usize) -> Self {
        let b = k>>BB;
        let r = k&MASK;
        let n = self.data.len();
        let mut res = vec![0; n];
        for i in 0..n.max(b)-b{
            res[i+b] |= self.data[i] << r;
            if r > 0 && i+b+1 < n {
                res[i+b+1] |= self.data[i] >> (BN-r);
            }
        }
        Self::build(res)
    }

    #[inline]
    pub fn get_shift_right(&self, k: usize) -> Self {
        let b = k>>BB;
        let r = k&MASK;
        let n = self.data.len();
        let mut res = vec![0; n];
        for i in b..n{
            res[i-b] |= self.data[i] >> r;
            if r > 0 && b+1 <= i {
                res[i-b-1] |= self.data[i] << (BN-r);
            }
        }
        Self::build(res)
    }

    #[inline]
    pub fn count_ones(&self) -> usize {
        self.data.iter().map(|x| x.count_ones() as usize).sum::<usize>()
    }

    #[inline]
    pub fn count_zeros(&self) -> usize {
        self.data.iter().map(|x| x.count_zeros() as usize).sum::<usize>()
    }
}

#[allow(unused)]
mod fxhash{
    use std::hash::BuildHasherDefault;

    #[derive(Default)]
    pub struct FxHasher{
        pub hash: u64,
    }
    impl std::hash::Hasher for FxHasher{
        #[inline(always)]
        fn finish(&self) -> u64 {
            self.hash
        }

        #[inline(always)]
        fn write(&mut self, bytes: &[u8]) {
            let mut h = self.hash;
            for &b in bytes{
                h = h.rotate_left(5)^(b as u64);
                h = h.wrapping_mul(0x517cc1b727220a95);
            }
            self.hash = h;
        }
    }
    pub type FxBuildHasher = BuildHasherDefault<FxHasher>;
    pub type FxMap<K, V> = std::collections::HashMap<K, V, FxBuildHasher>;
    pub type FxSet<K> = std::collections::HashSet<K, FxBuildHasher>;
}
#[allow(unused_imports)]
use fxhash::{FxSet, FxMap, FxBuildHasher};

#[allow(unused_imports)]
use proconio::{input, input_interactive, marker::{*}, fastout};
/*
#[allow(unused_imports)]
use rustc_hash::FxHasher;
#[allow(dead_code)]
type FxMap<K, V> = HashMap<K, V, BuildHasherDefault<FxHasher>>;
#[allow(dead_code)]
type FxSet<K> = HashSet<K, BuildHasherDefault<FxHasher>>;
#[allow(unused_imports)]
use rand::{Rng, seq::SliceRandom, prelude::*};
#[allow(unused_imports)]
use itertools::Itertools;
#[allow(unused_imports)]
use ordered_float::OrderedFloat;
#[allow(unused_imports)]
use num_bigint::BigInt;
#[allow(unused_imports)]
use ac_library::{*, ModInt1000000007 as mint};
*/
#[allow(dead_code)]
//type MI = StaticModInt<Mod1000000007>;pub fn factorial_mint(n: usize)->(Vec<MI>, Vec<MI>){ let mut res = vec![mint::new(1); n+1];let mut inv = vec![mint::new(1); n+1];for i in 0..n{res[i+1] = res[i]*(i+1);}inv[n] = mint::new(1)/res[n];for i in (0..n).rev(){inv[i] = inv[i+1]*(i+1);}(res, inv)}pub fn cm(a: usize, b: usize, mf: &(Vec<MI>, Vec<MI>))->MI{if a<b{MI::new(0)}else{mf.0[a]*mf.1[b]*mf.1[a-b]}}
#[allow(dead_code)]
const INF: i64 = 1<<60;
#[allow(dead_code)]
const I: i32 = (1<<30)-1;
#[allow(dead_code)]
const MOD: i64 = 998244353;
#[allow(dead_code)]
const D: [(usize, usize); 4] = [(1, 0), (0, 1), (!0, 0), (0, !0)];
#[allow(dead_code)]
pub fn c2d(c: u8)->(usize, usize){match c{b'U'=>(!0,0),b'D'=>(1,0),b'L'=>(0,!0),b'R'=>(0,1),_=>unreachable!()}}
#[allow(dead_code)]
pub fn c2d_i64(c: u8)->(i64, i64){match c{b'U'=>(-1,0),b'D'=>(1,0),b'L'=>(0,-1),b'R'=>(0,1),_=>unreachable!()}}
#[allow(dead_code)]
const D2: [(usize, usize); 8] = [(1, 0), (1, 1), (0, 1), (!0, 1), (!0, 0), (!0, !0), (0, !0), (1, !0)];

//#[fastout]
fn main() {
    let t = 1;
    //input!{t: usize,}
    for _ in 0..t{
        solve();
    }
}

//#[fastout]
fn solve(){
    input!{
        n: usize, m: usize, k: i32,
        mut a: [i32; n],
    }
    a.sort();
    let mut left = vec![0; n];
    let mut right = vec![0; n];
    let mut r = 0;
    for i in 0..n{
        while r < n && a[r] <= a[i]+k{
            r += 1;
        }
        right[i] = r;
    }
    let mut l = n;
    for i in (0..n).rev(){
        while l > 0 && a[i] <= a[l-1]+k{
            l -= 1;
        }
        left[i] = l;
    }
    let mut dp = vec![1; n];
    for _ in 0..m-1{
        let mut ndp = vec![0; n];
        let mut res = 0;
        let (mut lp, mut rp) = (0, 0);
        for (i, (&l, &r)) in left.iter().zip(&right).enumerate(){
            while rp < r{
                res = (res+dp[rp])%MOD;
                rp += 1;
            }
            while lp < l{
                res = (res+MOD-dp[lp])%MOD;
                lp += 1;
            }
            ndp[i] = res;
        }
        dp = ndp;
    }
    let mut ac = 0;
    for &v in &dp{
        ac = (ac+v)%MOD;
    }
    println!("{}", ac);
}