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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int a[100005],b[100005],c[100005],n,maxx,m,poz,sol[100005];
int main()
{
f>>n;
for(int i=1;i<=n;i++) f>>a[i];
maxx=1;
for(int i=1;i<=n;i++)
{
c[i]=-1;maxx=1;b[i]=1;
for(int j=1;j<=i-1;j++)
{
if(a[j]<a[i] && b[j]+1>maxx) {maxx=b[j]+1;c[i]=j;}
}
b[i]=maxx;
if(b[i]>m) {m=b[i];poz=i;}
}
//cout<<poz;
while(c[poz]!=-1)
{
sol[0]++;sol[sol[0]]=a[poz];
poz=c[poz];
}
sol[0]++;sol[sol[0]]=a[poz];
g<<sol[0]<<"\n";
for(int i=sol[0];i>=1;i--) g<<sol[i]<<" ";
return 0;
}