#include <iostream>
#include <cstdio>

using namespace std;

int v[100005],l[100005],t[100005];

void print(int i)
{
    if(t[i])
        print(t[i]);
    printf("%d ",v[i]);
}

int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;++i)
        scanf("%d",&v[i]);
    int maxim=0,imax;
    for(int i=1;i<=n;++i)
    {
        l[i]=1;
        for(int j=1;j<i;++j)
            if(v[j]<v[i]&&l[j]+1>l[i])
            {
                l[i]=l[j]+1;
                if(l[i]>maxim)
                {
                    maxim=l[i];
                    imax=i;
                }
                t[i]=j;
            }
    }
    printf("%d\n",maxim);
    print(imax);
    return 0;
}