#include <bits/stdc++.h>
using namespace std;

#ifndef aa
#define trace(...)
#define endl '\n'
#endif
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define fi first
#define se second
#define int long long
typedef long long ll;
typedef long double ld;
#define pii pair<int,int>
#define pdd pair<double,double>
#define sz(x) ((long long)x.size())
#define fr(a,b,c) for(int a=b; a<=c; a++)
#define frev(a,b,c) for(int a=c; a>=b; a--)
#define rep(a,b,c) for(int a=b; a<c; a++)
#define trav(a,x) for(auto &a:x)
#define all(con) con.begin(),con.end()
#define done(x) {cout << x << endl;return;}
#define mini(x,y) x=min(x,y)
#define maxi(x,y) x=max(x,y)
const ll infl = 0x3f3f3f3f3f3f3f3fLL;
const int infi = 0x3f3f3f3f;
mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count());
const int mod = 998244353;
//const int mod = 1e9 + 7;
typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<vector<int>> vvi;
typedef vector<pair<int, int>> vpii;
typedef map<int, int> mii;
typedef set<int> si;
typedef set<pair<int,int>> spii;
typedef queue<int> qi;

//DEBUG FUNCTIONS START
#define cerr cout
void __print(int x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define deb(x...) cerr << "[" << #x << "] = "; _print(x)
#else
#define deb(x...)
#endif
// DEBUG FUNCTIONS END


const int N = 3e3+5;
int dp[N][N];


void solve(){
	
	int n, k;
	cin>>n>>k;
	dp[0][0] = 1;
	
	fr(i,1,n){
		frev(j,0,n){
			
			if(j)
				dp[i][j] = dp[i-1][j-1];
				
			(dp[i][j] += (2*j>i ? 0 : dp[i][2*j]))%=mod;
			
		}
	}
	
	
	
	cout<<dp[n][k];
	
}



signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    //srand(chrono::high_resolution_clock::now().time_since_epoch().count());
    cout << fixed << setprecision(15);
    int t = 1;
    //cin >> t;
    while (t--)
        solve();
#ifdef aa
    cout << endl << endl << endl << endl << "Time elapsed: " << (double)(clock() - clk) / CLOCKS_PER_SEC << endl;
#endif
    return 0;
}

int powm(int a, int b){
    int res = 1;
    while (b) {
        if (b & 1)
            res = (res*a) % mod;
        a = (a * a) % mod;
        b >>= 1;
    }
    return res;
}
 
int divide(int a, int b) {
    return (a % mod) * powm(b, mod - 2) % mod;
}
 
int norm(int a) {
    while (a >= mod) a -= mod;
    while (a < 0) a += mod;
    return a;
}
#include<bits/stdc++.h>
typedef int LL;
typedef double dl;
#define opt operator
#define pb push_back
const LL maxn=6e3+9,mod=998244353,inf=0x3f3f3f3f;
LL Read(){
	LL x(0),f(1); char c=getchar();
	while(c<'0' || c>'9'){
		if(c=='-') f=-1; c=getchar();
	}
	while(c>='0' && c<='9'){
		x=(x<<3ll)+(x<<1ll)+c-'0'; c=getchar();
	}return x*f;
}
void Chkmin(LL &x,LL y){
	if(y<x) x=y;
}
void Chkmax(LL &x,LL y){
	if(y>x) x=y;
}
LL add(LL x,LL y){
	return x+=y,x>=mod?x-mod:x;
}
LL dec(LL x,LL y){
	return x-=y,x<0?x+mod:x;
}
LL mul(LL x,LL y){
	return 1ll*x*y%mod;
}
LL Pow(LL base,LL b){
	LL ret(1); while(b){
		if(b&1) ret=mul(ret,base); base=mul(base,base); b>>=1;
	}return ret;
}
LL n,K;
LL f[maxn][maxn];
int main(){
	n=Read(); K=Read();
	if(n==1 && K==1){
		puts("1"); return 0;
	}
	for(LL i=2;i<=n;i+=2) f[0][i]=1;
	for(LL i=0;i<=n;++i){
		if(i){
		    for(LL j=1;j<=n;++j){
			    f[i][j]=add(f[i][j-1],f[i][j]);
		    }
		}
		for(LL j=0;j<=n;++j) {
			if(j&1) continue;
			if(!j) continue;
			LL x(f[i][j]);
			LL l(j/2);
			f[i+l][l]=add(f[i+l][l],x);
		}
	}
//	printf("%d\n",f[1][2]);
//	printf("%d\n",f[2][2]);
//	printf("%d\n",f[3][1]);
	printf("%d\n",f[n-K][K]);
	return 0;
	LL ret(0);
//	printf("%d\n",f[4][2]);
	for(LL i=0;i<=K;++i){
		ret=add(ret,f[n-(K-i)][K-i]);
	}
	printf("%d\n",ret);
//	printf("%d\n",f[n-K][n]);
	return 0;
}


