#include <stdio.h>
FILE *fin=fopen ("scmax.in","r"),
     *fout=fopen("scmax.out", "w");
long v[100001], n, i, lung[100001], poz[100001], max, j, p;

int main()
{
fscanf(fin,"%ld",&n)	;
for (i=1; i<=n; i++)
	fscanf(fin, "%ld", &v[i]);
max=1;
lung[n]=1;
p=n;
for (i=n-1; i>=1; i--)
{lung[i]=1;poz[i]=0;
 for (j=i+1; j<=n; j++)
	 if (v[j]>v[i])
		 if (lung[j]+1>lung[i])
		 {lung[i]=lung[j]+1;
		  poz[i]=j;}
 if (lung[i]>max){max=lung[i]; p=i;}		 
}
fprintf(fout, "%ld\n",max);
fprintf(fout,"%ld ", v[p]);
for (i=1; i<max; i++)
	{  p=poz[p];
		fprintf(fout,"%ld ",v[p]);
	}	

return 0;
}