#include using namespace std; #define rep(i,n) for(int i=0; i<(n); i++) #define INF ((1LL<<62)-(1LL<<31)) #define all(a) (a).begin(),(a).end() #define rall(a) (a).rbegin(),(a).rend() typedef long long ll; typedef pair pl; const ll mod=998244353; int main() { ll n; cin >> n; ll len=4*n; vector>> dp(n,vector> (len,vector (n,0))); for(int i=1;i