#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,a[100001],l[100001],max1,i,j,p;
int main()
{f>>n;
for(i=1;i<=n;i++)
    f>>a[i];
l[n]=1;
for(i=n-1;i>=1;i--)
{max1=0;
    for(j=i+1;j<=n;j++)
   {if(l[j]>max1&&a[j]>a[i])max1=l[j];
   }
l[i]=max1+1;
}
 max1=0;
 for(i=1;i<=n;i++)
 {if(l[i]>max1){p=i;max1=l[i];}
 }
   g<<max1<<'\n';
   while(max1)
   {g<<a[p]<<" ";
     max1--;
     for(j=p+1;j<=n;j++)
     {if(l[j]==max1&&a[j]>a[p]){p=j;break;}
     }
   }

    return 0;
}