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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,i,v[100001],x[100001],j,maxim,u;
int k,indice,v2[100001];
int main()
{
fin >> n;
for(i=0;i<n;i++)
{
fin >> v[i];
}
x[0]=1;
for(i=1;i<n;i++)
{
j=i;
maxim=0;
for(j=i;j>=0;j--)
{
if(v[j]<v[i] and maxim<x[j])
{
maxim=x[j];
}
}
x[i]=maxim+1;
}
maxim=0;
for(i=0;i<n;i++)
{
if(maxim<x[i])
{
maxim=x[i];
indice=v[i];
u=i;
}
}
v2[0]=indice;
k=1;
for(i=u-1;i>=0;i--)
{
if(v[i]<indice and x[i]==x[u]-1)
{
v2[k]=v[i];
k++;
indice=v[i];
u=i;
}
}
fout << maxim << endl;
for(i=k-1;i>=0;i--)
fout << v2[i]<< ' ';
return 0;
}