#include<stdio.h>
FILE*f=fopen("scmax.in","r");
FILE*g=fopen("scmax.out","w");
int best[100003],a[100003], max,sol=0,poz[100003],p;
int n;
void read()
{
fscanf(f,"%d",&n);
for(int i=1;i<=n;++i) fscanf(f,"%d",&a[i]);
}
void dinamic()
{
int i,j;
best[n]=1;
poz[n]=-1;
max=1; p=n;
for(i=n-1;i>=1;--i)
{
best[i]=1;
poz[i]=-1;
for(j=i+1;j<=n;++j)
if(a[i]<a[j] && best[i]<best[j]+1)
{
best[i]=best[j]+1;
poz[i]=j;
if(best[i]>max) max=best[i],p=i;
}
}
}
void constr()
{
int i;
i=p;
while(i!=-1)
{
fprintf(g,"%d ",a[i]);
i=poz[i];
}
}
int main()
{
read();
dinamic();
fprintf(g,"%d\n",max);
constr();
return 0;
}