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#include <bits/stdc++.h>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int i,j,n,l[100005],poz[100005],a[100005],maxim,pozmax;
int main()
{
f>>n;
for(int i=1;i<=n;i++)f>>a[i];
l[n]=1;
poz[n]=-1;
for(i=n-1; i>0; i--)
{
for(l[i]=1, poz[i]=-1, j=i+1; j<=n; j++)
{
if(a[i]<a[j] && l[i]<1+l[j])
{
l[i]=1+l[j];
poz[i]=j;
}
}
}
maxim=l[1];
pozmax=1;
for(int i=2; i<=n; i++)
{
if(maxim<l[i])
{
maxim=l[i];
pozmax=i;
}
}
g<<maxim<<'\n';
for(i=pozmax; i!=-1; i=poz[i])
{
g<<a[i]<<' ';
}
return 0;
}