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#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
vector<int> SCLM[100002]; /// SCLM[i]=sirul cresc de lung i+1 cel mai optim, 0 <= i <n
int lmax,n;
/// returneaza poz primului elem mai mare ca q
int CB(int q)
{
int st=0,dr=lmax-1;
int rez=lmax;
while(st<=dr)
{
int mij=(st+dr)/2;
if(SCLM[mij][mij]<q)
st=mij+1;
else
{
dr=mij-1;
rez=mij;
}
}
return rez;
}
int main()
{
fin >> n;
int x;
fin >> x;
SCLM[0].push_back(x);
lmax=1;
for(int i=2;i<=n;i++)
{
fin >> x;
int poz=CB(x);
//cout << x << ' ' << poz << '\n';
if(poz==0)
{
SCLM[0][0]=x;
continue;
}
if(poz==lmax)
lmax++;
SCLM[poz].clear();
for(int j=0;j<=poz-1;j++)
SCLM[poz].push_back(SCLM[poz-1][j]);
SCLM[poz].push_back(x);
}
fout << lmax << '\n';
for(int i=0;i<lmax;i++) fout << SCLM[lmax-1][i] << ' ';
return 0;
}