#include <bits/stdc++.h>

using namespace std;

ifstream f("scmax.in");
ofstream g("scmax.out");

int v[1000],best[1000],poz[100],b[1000],p;

int main()
{

  int n,i,nr=0,j;

  f >> n ;

  for(i = 1; i <= n; i++)
  {
      f >> v[i];
  }

  best[n]= 1;
  poz[n] = -1;
  for(i = n - 1; i >= 1; i--)
  {
      for( j = i+1; j <= n; j++)
      {

          if(v[i] < v[j]&& best[i] < best[j] + 1)
          {

              best[i] = best[j] + 1;
              poz[i] = j ;
              p = i ;


          }

      }

  }

  g<<best[p]<<endl;

  while(p!=-1)
  {
      g<<v[p]<<" ";
      p=poz[p];
  }




    return 0;
}