/*
    Those without power, seek us!
    Those with power, fear us!
    We are the Order of the Black Knights!
*/

#include<fstream>
#include<cstdio>
#include<map>
#include<set>
#define FIT(a,b) for(vector<int >::iterator a=b.begin();a!=b.end();a++)
#define FITP(a,b) for(vector<pair<unsigned int,int> >::iterator a=b.begin();a!=b.end();a++)
#define RIT(a,b) for(vector<int>::reverse_iterator a=b.end();a!=b.begin();++a)
#include<stack>
#define ROF(a,b,c) for(int a=b;a>=c;--a)
#include<vector>
#include<algorithm>
#define FOR(a,b,c) for(int a=b;a<=c;++a)
#define REP(a,b) for(register int a=0;a<b;++a)
#include<cstring>
#include<ctime>
#include<bitset>
#include<cmath>
#include<iomanip>
#include<set>
#define f cin
#define g cout
#include<queue>
#define debug cerr<<"OK";
#define pii pair<int,int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define ll long long
#define ull unsigned int
#define mod 1000000009LL
#define SQR 350
#define inf 1<<30
#define div fdasfasd
#define hash dsafdsfds
#define od 100003
#define mod  4398042316799LL
#define DIM 60010000
#define base 256
#define bas 255
#define N 100100
using namespace std;
/*
    int dx[]={0,0,0,1,-1};
    int dy[]={0,1,-1,0,0};
*/
ifstream f("scmax.in");
ofstream g("scmax.out");

int sol[N],s[N],v[N],L[N],t,n,ts,p,tt;

int cb(int x)
{
    int st=1,dr=t;
    while(st<=dr)
    {
        int mij=(st+dr)>>1;
        if(s[mij]>=x)
            dr=mij-1;
        else
            st=mij+1;
    }
    return dr+1;
}
int main ()
{
    f>>n;
    FOR(i,1,n)
    {
        f>>v[i];
        if(!t||v[i]>s[t])
        {
            s[++t]=v[i];
            L[i]=t;
        }
        else
        {
            s[cb(v[i])]=v[i];
            L[i]=cb(v[i]);
        }
        if(t>tt)
        {
            tt=t;
            p=i;
        }
    }
    g<<tt<<"\n";
    while(tt--)
    {
        sol[++ts]=v[p];
        while(1)
        {
            --p;
            if(L[p]==tt&&v[p]<sol[ts])
                break;
        }
    }
    ROF(i,ts,1)
    g<<sol[i]<<" ";
    return 0;
}