#include <fstream.h>    
int n, v[100003], best[100003], p[100003], maxim, k, L[100003], nr;   
  ofstream g("scmax.out");
void afis(int i)   
{   
   if (p[i] > 0)  afis(p[i]);   
   g<<v[i]<<" ";   
}   
  
int caut(int x)   
{   
   int p, u, m;   
   p = 0; u = nr; m = (p+u)/2;   
   while (p <= u)   
   {   
      if (v[L[m]] < x &&  v[L[m+1]] >= x) return m;   
      else if (v[L[m+1]] < x) {p = m + 1; m = (p + u)/2;}   
      else {u = m - 1; m = (p + u)/2;}   
   }   
   return nr;   
}   
  
int main()   
{   
   ifstream f("scmax.in");   
      
   int i, j, poz;   
   nr = 1;   
   f>>n;   
   for (i = 1; i <= n; i++) f>>v[i];   
   best[1] = L[1] = 1; L[0] =  0;   
  
   for (i = 2; i <= n; i++)   
   {   
      poz = caut(v[i]);   
      p[i] = L[poz];   
      best[i] = poz + 1;   
      L[poz + 1] = i;   
      if (nr < poz + 1)   nr = poz + 1;   
   }   
   maxim = 0; poz = 0;   
   for (i = 1; i <= n; i++)   
       if (maxim < best[i])   
       {   
          maxim = best[i]; poz = i;   
       }   
   g<<maxim<<"\n";   
   afis(poz);   
   return 0;      
}