#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); i++)
template<typename T> inline bool chmax(T &a, T b) {return ((a < b) ? (a = b, true) : (false));}
template<typename T> inline bool chmin(T &a, T b) {return ((a > b) ? (a = b, true) : (false));}
typedef long long ll;
typedef pair<ll,ll> P;



int main() {
    ll n, k;
    cin >> n >> k;
    vector<ll> a(n);
    rep(i,n) cin >> a[i];

    ll ans = 0;
    rep(i,1<<n) {
        ll sum = 0, cnt = 0;
        rep(j,n) {
            if(i>>j&1) {
                sum += a[j];
                cnt++;
            }
        }
        if(cnt == k && sum % 998244353 <= sum % 998) {
            ans++;
        }
    }
    cout << ans % 998 << endl;


    return 0;
}