# include<iostream> using namespace std; int main(){ int n,m,b; cin>>n>>m; int a[n]; for(int i=0;i<n;i++){ cin>>a[i]; } b=a[0]; cout<<b<<endl; for(int i=0;i<=a[b];i++){ if(i==a[b]){ cout<<i<<endl; } } return 0; }