# include<stdio.h>
int x, max,max1,poz,poz1,n,i,j,a[100010],l[100010],t[100010];
int main()
{
freopen("scmax.in","r",stdin);
freopen("scmax.out","w",stdout);
scanf("%d\n",&n);
for (i=1; i<=n; i++)
scanf("%d ",&a[i]);
l[n]=1; t[n]=-1;
max=0;
for (i=n-1; i>=1; i--)
{
l[i]=1;
t[i]=-1;
for (j=i+1; j<=n; ++j)
if (a[j]>a[i] && l[j]+1>l[i])
{
l[i]=l[j]+1; t[i]=j;
if (l[i]>max) { max=l[i]; poz1=i; }             
}
}
printf("%d\n",max);
x=poz1;
while (x!=-1)
{
printf("%d ",a[x]);
x=t[x];
}
return 0;
}