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#include <bits/stdc++.h>
#define NMAX 100002
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, l, t[NMAX], poz[NMAX];
long long v[NMAX], sol[NMAX];
int bs(long long val)
{
int st=1, dr=l, mijl;
while(st<=dr)
{
mijl=st+(dr-st)/2;
if(val>v[t[mijl]]) st=mijl+1;
else dr=mijl-1;
}
return st;
}
int main()
{
int i, k, q=0;
fin>>n;
for(i=1; i<=n; i++) fin>>v[i];
l=1, t[1]=1;
for(i=2; i<=n; i++)
{
k=bs(v[i]);
poz[i]=t[k-1];
t[k]=i;
l=max(l,k);
}
for(i=t[l]; i>0; i=poz[i])
sol[++q]=v[i];
reverse(sol+1,sol+q+1);
fout<<l<<'\n';
for(i=1; i<=q; i++) fout<<sol[i]<<' ';
return 0;
}