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#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100001],n,best[100001],rasp,parinte[100001],pozitie[1000001],w[100001],crasp;
int main()
{
f>>n;
for(int i=1; i<=n; ++i)
{
f>>v[i];
}
best[1]=v[1];
pozitie[1]=1;
parinte[1]=0;
rasp=1;
for(int i=2; i<=n; ++i)
{
if(v[i]>best[rasp])
{
rasp++;
best[rasp]=v[i];
pozitie[rasp]=i;
parinte[i]=pozitie[rasp-1];
}
else
{
int in=1,sf=rasp,poz=0;
while(in<=sf)
{
int mij=(in+sf)/2;
if(best[mij]>=v[i])
{
sf=mij-1;
poz=mij;
}
else
{
in=mij+1;
}
}
best[poz]=v[i];
pozitie[poz]=i;
parinte[i]=pozitie[poz-1];
}
}
g<<rasp<<'\n';
crasp=rasp;
int x = pozitie[rasp];
while(x != 0)
{
w[rasp]=v[x];
x = parinte[x];
rasp--;
}
for(int i=1; i<=crasp; ++i)
{
g<<w[i]<<" ";
}
return 0;
}