#include<cstdio>
#include<vector>
using namespace std;
int main()
{
    vector<int> v;
    int a[100001],sol[100001],st[100001],i,j,n,m,p,q;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    a[0]=0;
    for(i=1;i<=n;i++) {scanf("%d",&a[i]); sol[i]=1; st[i]=0;}
    sol[0]=0; st[0]=0;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i-1;j++)
        {
            if(a[i]>a[j]&&sol[j]+1>sol[i]) {sol[i]=sol[j]+1; st[i]=j;}
        }
    }
    printf("%d\n",sol[n]);
    i=n;
    do
    {
        if(a[i]>a[st[i]]) {v.push_back(a[i]); i=st[i];}
    }
    while(i);
    for(i=v.size()-1;i>=0;i--) printf("%d ",v[i]);
    //for(i=1;i<=n;i++) printf("%d ",st[i]);
    return 0;
}