#include <bits/stdc++.h>
using namespace std;

ifstream fin ("scmax.in");
ofstream fout("scmax.out");

int n, maxi, lmax, v[100010], t[100010], dp[100010], p, q;

void drum(int u) {
    if (u) {
        drum(t[u]);
        
        cout << v[u] << " ";
    }
}

int main () {
    cin >> n;
    
    for (int i = 1; i <= n; i++)
        cin >> v[i];
        
    dp[1] = 1;
    
    for (int i = 2; i <= n; i++) {
        maxi = 0;
        
        for (int j = 1; j < i; j++)
            if (v[j] < v[i] && dp[j] > maxi) {
                maxi = dp[j];
                p = j; 
            }
            
        dp[i] = maxi + 1;
        
        if (dp[i] != 1) t[i] = p; 
        
        else t[i] = 0; 
            
        if (dp[i] > lmax) {
            lmax = dp[i];
            q = i;
        }
    }
    
    cout << lmax;
    
    drum(q);
    
    return 0;
}