#include <iostream>
#include <fstream>
#include <vector>
#define NMAX 100005
using namespace std;
ifstream fi("scmax.in");
ofstream fo("scmax.out");

int N;
int sir[NMAX];
int dp[NMAX];
int origin[NMAX];

vector<int> s;

int main()
{
    fi >> N;
    for(int i = 1; i <= N; ++i)
    {
        fi >>sir[i];
        dp[i] = 1;
        origin[i] = 0;
    }


    for(int i = 2; i <= N; ++i)
    {
        for(int j = 1; j < i; ++j)
        {
            if(sir[j] < sir[i])
            {
                if(dp[j] + 1 > dp[i])
                {
                    dp[i] = dp[j] + 1;
                    origin[i] = j;
                }
            }
        }
    }
    int maxx = 0;
    int maxi;
    for(int i = 1;i <= N; ++i)
    {
        if(dp[i] > maxx)
        {
            maxx = dp[i];
            maxi = i;
        }
    }

    fo << maxx<<"\n";

    while(maxi != 0)
    {
        s.push_back(sir[maxi]);
        maxi = origin[maxi];
    }

    for(auto it = s.rbegin(); it != s.rend(); ++it)
        fo << *it << " ";
}