#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n, i, v[100003], w[100003], Max, urm[100003], j, p;
int main()
{
    f>>n;
    for(i=1; i<=n; i++)
        f>>v[i];
    for(i=n; i>=1; i--) {
        Max=0;
        for(j=i+1; j<=n; j++)
            if(v[j]>v[i] and w[j]>Max)
                Max=w[j], urm[i]=j;
        w[i]=Max+1;
    }
    for(i=1; i<=n; i++)
        if(w[i]>Max) Max=w[i], p=i;
    g<<Max<<'\n';
    while(p) {
        g<<v[p]<<' ';
        p=urm[p];
    }
    return 0;
}