#include using namespace std; //#define int long long #define REP(i,m,n) for(int i=(m);i<(n);i++) #define rep(i,n) REP(i,0,n) #define pb push_back #define all(a) a.begin(),a.end() #define rall(c) (c).rbegin(),(c).rend() #define mp make_pair #define endl '\n' #define vec vector #define mat vector > #define fi first #define se second #define double long double typedef long long ll; typedef unsigned long long ull; typedef pair pll; //typedef long double ld; typedef complex Complex; const ll INF=1e9+7; const ll MOD=INF; const ll inf=INF*INF; ll mod=MOD; const ll MAX=100010; signed main(){ ll n,m;cin>>n>>m; vector >dp(n+1,vector(n*n+1)); vector >dp1(n+1,vector(n*n+1)); dp[0][0]=1; rep(i,2*n){ rep(j,n+1){ rep(k,n*n+1){ if(i-j