#include <fstream>
#pragma GCC optimize("O3,unroll-loops")
#include <algorithm>
#include <cstring>
#include <climits>
#include <iomanip>
#include <numeric>
#include <bitset>
#include <string>
#include <vector>
#include <cmath>
#include <queue>
#include <deque>
#include <stack>
#include <list>
#include <map>
#include <set>
//#define int long long
//#define int short
#define pb push_back
#define f first
#define s second
using namespace std;

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

const int nmax = 1e5;

int n, v[nmax + 5], mxlen = 0;
int dp[nmax + 5];
int idx[nmax + 5];
int pre[nmax + 5];

void fastio(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

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

void calcdp(){
    dp[1] = v[1];
    idx[1] = 1;
    pre[1] = 0;
    mxlen = 1;
    for (int i = 2; i <= n; i++){
        int t = lower_bound(dp + 1, dp + mxlen + 1, v[i]) - dp;
        dp[t] = v[i];
        idx[t] = i;
        pre[i] = idx[t - 1];
        mxlen = max(mxlen, t);
    }
}

vector<int> get(){
    int mxidx = idx[mxlen];
    vector<int> rez;
    while (mxidx){
        rez.pb(v[mxidx]);
        mxidx = pre[mxidx];
    }
    reverse(rez.begin(), rez.end());
    return rez;
}

void handleoutput(){
    calcdp();
    int mxidx = idx[mxlen];
    cout<<mxlen<<"\n";
    for (auto& idk : get()){
        cout<<idk<<" ";
    }
}

signed main(){
    fastio();
    handleinput();
    handleoutput();
}