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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int v[100002],dp[100002],t[100002],a[100002];
int n,i,j,maxx,poz;
void rec(int poz)
{
if(t[poz]>0)
rec(t[poz]);
fout<<v[poz]<<" ";
}
int st,dr,mijl,k;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>v[i];
k=0;
for(i=1;i<=n;i++)
{
dp[i]=1;
st=1;dr=k;
while(st<=dr)
{
mijl=(st+dr)/2;
if(v[i]>v[a[mijl]])
st=mijl+1;
else
dr=mijl-1;
}
a[st]=i;
t[i]=a[st-1];
dp[i]=st;
if(maxx<st)
{
maxx=st;
poz=i;
}
if(k<st)
k=st;
}
fout<<maxx<<'\n';
rec(poz);
return 0;
}