#include <fstream>
using namespace std;
int a[10000],b[1000],i,j,x,k,n,lmax,y,nr,m;
int main()
{ifstream f("scmax.in");
ofstream g("scmax.out");
f>>n;
nr=1;
for (i=1;i<=n;i++) f>>a[i];
b[n]=1;
for (i=n-1;i>=1;i--)
{lmax=0;
    for (j=i+1;j<=n;j++)
    if (b[j]>lmax&&a[j]>a[i]) lmax=b[j];
    b[i]=lmax+1;
}
lmax=0;
for (i=1;i<=n;i++) if(b[i]>lmax) {lmax=b[i];y=i;}
lmax--;
g<<lmax+1<<endl;
g<<b[y]<<" ";
for (i=y+1;i<=n;i++) if (a[i]>m&&b[i]==lmax)
{m=a[i];
g<<a[i]<<" ";
 lmax--;
}
f.close();
g.close();
return 0;
}