#include using namespace std; #include using namespace atcoder; using mint=modint998244353; //1000000007; using ll=long long; using pp=pair; #define sr string #define vc vector #define fi first #define se second #define rep(i,n) for(int i=0;i<(int)n;i++) #define pb push_back #define all(v) v.begin(),v.end() #define pque priority_queue #define bpc(a) __builtin_popcount(a) int main(){ int n,m;cin>>n>>m; bool ans=true; int b=1<v(b,0); vcx; rep(i,m){ int a;cin>>a; v[a]=1; x.pb(a); } if(!v.back())ans=0; rep(i,m)rep(j,i)if(!v[x[i]&x[j]])ans=0; vcg(b,0); rep(i,b)if(v[i])g[i]=i; rep(i,n)rep(j,b)if(~j>>i&1)g[j^1<