#include<stdio.h>
int l[100001];
int main()
{
    int n,v[100001],i,max=0,j;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    l[n]=1;
    for(i=n-1;i>=1;i--)
    {
        max=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]&&max<l[j])
                max=l[j];
        l[i]=max+1;
        if(max==0)
            l[i]=1;
    }
    max=0;
    for(i=1;i<=n;i++)
        if(l[i]>max)
            max=l[i];
    printf("%d\n",max);
    for(i=1;i<=n;i++)
        if(l[i]==max)
        {
            printf("%d ",v[i]);
            max--;
        }
    return 0;
}