#include <iostream>
#include <fstream>

using namespace std;

int main(){
    ifstream fin("scmax.in"); ofstream fout("scmax.out");
    long v[100001], n, l[100001], urm[100001], i, max, p, j, max1=1, p1=1;
    fin>>n;
    for(i=1; i<=n; i++) fin>>v[i];
    l[n]=1; urm[n]=0;
    for(i=n-1; i>=1; i--){
        max=0; p=0;
        for(j=i+1; j<=n; j++)
            if(v[i]<v[j] && l[j]>max){
                max=l[j];
                p=j;}
            l[i]=max+1; urm[i]=p;
            if(l[i]>max1) {max1=l[i]; p1=i;};}

    fout<<max1<<"\n";
    while(p1>0){
        fout<<v[p1]<<" ";
        p1=urm[p1];}

    return 0;}