#include #include using namespace std; using namespace atcoder; istream &operator>>(istream &is, modint &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint &a) { return os << a.val(); } istream &operator>>(istream &is, modint998244353 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint998244353 &a) { return os << a.val(); } istream &operator>>(istream &is, modint1000000007 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint1000000007 &a) { return os << a.val(); } typedef long long ll; typedef vector> Graph; typedef pair pii; typedef pair pll; #define FOR(i,l,r) for (int i = l;i < (int)(r); i++) #define rep(i,n) for (int i = 0;i < (int)(n); i++) #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define my_sort(x) sort(x.begin(), x.end()) #define my_max(x) *max_element(all(x)) #define my_min(x) *min_element(all(x)) template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } const int INF = (1<<30) - 1; const ll LINF = (1LL<<62) - 1; const int MOD = 998244353; const int MOD2 = 1e9+7; const double PI = acos(-1); vector di = {1,0,-1,0}; vector dj = {0,1,0,-1}; #ifdef LOCAL # include # define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define debug(...) (static_cast(0)) #endif using mint = modint998244353; int main(){ cin.tie(0); ios_base::sync_with_stdio(false); int N, M, K; cin >> N >> M >> K; int L = (1 << N); if(M==1){ cout << L << endl; return 0; } auto check = [&](int s, int t){ int cnt = 0; rep(i,N)if(((s>>i)&1) && ((t>>i)&1)) cnt++; return cnt >= K; }; vector dp(M, vector(L)); rep(s,L)if(check(s,L-1))dp[0][s] = 1; for(int i = 0; i < M - 1; i++){ for(int s = 0; s < L; s++){ if(dp[i][s] == 0) continue; for(int s_nxt = 0; s_nxt < L; s_nxt++){ if(check(s, s_nxt))dp[i + 1][s_nxt] += dp[i][s]; } } } mint ans = 0; rep(s, L)if(check(s,L-1))ans += dp[M - 1][s]; cout << ans << endl; }