#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int N; const ll mo=998244353; ll memo[4040][4040]; ll comb(ll N_, ll C_) { const int NUM_=400001; static ll fact[NUM_+1],factr[NUM_+1],inv[NUM_+1]; if (fact[0]==0) { inv[1]=fact[0]=factr[0]=1; for (int i=2;i<=NUM_;++i) inv[i] = inv[mo % i] * (mo - mo / i) % mo; for (int i=1;i<=NUM_;++i) fact[i]=fact[i-1]*i%mo, factr[i]=factr[i-1]*inv[i]%mo; } if(C_<0 || C_>N_) return 0; return factr[C_]*fact[N_]%mo*factr[N_-C_]%mo; } ll hoge(int len,int id) { if(len<=1) return 1; if(id==0||id==len-1) return 0; if(memo[len][id]>=0) return memo[len][id]; int L=id,R=len-(id+1); ll ret=0; //両サイド ret+=hoge(len-2,id-1); //左 if(L>=3) ret+=hoge(len-2,id-2)*comb(L-1,2); //右 if(R>=3) ret+=hoge(len-2,id)*comb(R-1,2); //左右 if(L>=2&&R>=2) ret+=hoge(len-2,id-1)*(L-1)*(R-1); return memo[len][id]=ret%mo; } void solve() { int i,j,k,l,r,x,y; string s; cin>>N; MINUS(memo); FOR(i,2*N+1) cout<