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#include <iostream>
#include <cstdio>
#define NMAX 100001
using namespace std;
int v[NMAX], l[NMAX], poz[NMAX];
int n, m, prim;
int main()
{
ios_base::sync_with_stdio(false);
freopen("scmax.in", "r", stdin);
freopen("scmax.out", "w", stdout);
cin>>n;
for(int i=1; i<=n; i++)
{
cin>>v[i];
}
for(int i=n; i>=1; i--)
{
l[i]=1;
poz[i]=0;
for(int j=i+1; j<=n; j++)
{
if(v[i]<v[j] && l[i]<1+l[j])
{
l[i]=1+l[j];
poz[i]=j;
}
}
if(m<l[i])
{
m=l[i];
prim=i;
}
}
cout<<m<<'\n';
for(int i=prim; i>0; i=poz[i])
{
cout<<v[i]<<' ';
}
return 0;
}