#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vmi = vector<mint>;
using vvmi = vector<vmi>;
using vvvmi = vector<vvmi>;
#define all(a) (a).begin(), (a).end()
#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define rep(i, n) rep2(i, 0, n)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)

mint op(mint a, mint b){
    return a+b;
}
mint e(){return 0;}
using p = pair<int, int>;

int main(){

    int n, m, k; cin >> n >> m >> k;
    vi a(n); rep(i, n)cin >> a[i];
    sort(all(a));
    vector<p> vp(n);
    rep(i, n){
        int s;
        if(a[i] - a[0] <= k){
            s = 0;
        }else{
            int l = 0, r = i;
            int mid;
            while(r-l>1){
                mid = (l+r)/2;
                if(a[i] - a[mid] <= k){
                    r = mid;
                }else{
                    l = mid;
                }
            }
            s = r;
        }
        int t;
        if(a[n-1] - a[i] <= k){
            t = n-1;
        }else{
            int l = i, r = n-1;
            int mid;
            while(r-l>1){
                mid = (l+r)/2;
                if(a[mid] - a[i] <= k){
                    l = mid;
                }else{
                    r = mid;
                }
            }
            t = l;
        }
        vp[i] = {s, t};
    }
   
    vvmi dp(2, vmi(n, mint(0)));
    rep(i, n)dp[0][i] = mint(1);
    rep2(i, 1, m){
        int c = i%2;
        vmi s(n+1, 0);
        rep(j, n) s[j+1] = s[j] + dp[1-c][j];
        rep(j, n){
            auto [l, r] = vp[j];
            dp[c][j] = s[r+1] - s[l];
        }
    }mint ans = mint(0);
    rep(i, n)ans += dp[(m-1)%2][i];
    cout << ans.val() << endl;
    return 0;
}