#include <cstdio>
#include <vector>
#include <algorithm>

using namespace std;

#define NMAX 100007

int i,N,f,c;
int aib[NMAX],dp[NMAX],t[NMAX],p[NMAX];
vector < int > q,sol;

void update(int p,int x)
{
    for (;p<=N;p+=(p&(-p)))
    aib[p]=max(aib[p],x);
}

int query(int p)
{
    int ans=0;

    for (;p;p-=(p&(-p)))
    ans=max(ans,aib[p]);

    return ans;
}

int main()
{
freopen("scmax.in","r",stdin);
freopen("scmax.out","w",stdout);

scanf("%d",&N);

for (i=1;i<=N;++i)
{
    scanf("%d",&t[i]);
    q.push_back(t[i]);
}

sort(q.begin(),q.end());

for (i=1;i<=N;++i)
{
    p[i]=lower_bound(q.begin(),q.end(),t[i])-q.begin()+1;

    dp[i]=query(p[i]-1)+1;
    update(p[i],dp[i]);

    if (dp[i]>c)
    {
        c=dp[i];
        f=i;
    }

    //printf("%d ",dp[i]);
}

sol.push_back(f);

for (i=f;i;--i)
if (dp[i]==dp[f]-1 && p[i]<p[f])
{
    sol.push_back(i);
    f=i;
}

for (printf("%d\n",sol.size()),i=sol.size()-1;i>=0;--i)
printf("%d ",t[sol[i]]);

return 0;
}