#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");
int i,j,n,v[100001],l[100001],k,x, lmax,y,m;

int main() {
    fin>>n;
    for(i=1; i<=n; i++) {
        fin>>v[i];
    }
    l[n]=1;
    for (j = n - 1; j>=1; j--) {
        lmax = 0;
        for (i = j + 1; i <= n; i++)
            if (v[j] < v[i])
                if (lmax < l[i])
                    lmax = l[i];
        l[j] = lmax + 1;
    }
    for(i=1; i<=n; i++)
        if(l[i]>m) {
            m=l[i];
            x=i;
        }
    fout<<m<<'\n';
    m--;
    fout<<v[x]<<" ";
    y=v[x];
    for(i=x+1; m>=1; i++) {
        if(l[i]==m) {
            if(v[i]>y) y=v[i];
            fout<<v[i]<<" ";
            m--;
        }
    }
    return 0;
}
/*
                              4  4  3  2  1
// 75 5 16 15 69 40 16 19 48 43 33 79 88 90
                              j
*/