#include<bits/stdc++.h>
#define N 100010

using namespace std;

int n, a[N],b[N],c[N],mx;

void rec(int n) {
    if (!n) return;
    else {
        rec(c[n]);
        cout<<a[n]<<" ";
    }
}

int main() {
    ifstream cin("scmax.in");
    ofstream cout("scmax.out");

    cin>>n;
    for (int i=1; i<=n; i++) {
        cin>>a[i];
    }

    b[1]=1;
    for (int i=2; i<=n; i++) {
        b[i]=1;
        for (int j=1; j<i; j++) {
            if (a[j]<a[i] && b[j]+1>b[i]) {
                b[i]=b[j]+1;
                c[i]=j;
            }
        }
        if (b[i]>b[mx]) mx=i;
    }
    cout<<b[mx]<<'\n';
    rec(mx);

    return 0;
}