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#include <iostream>
#include <fstream>
#define nmax 100001
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[nmax],lg[nmax],t[nmax],sol[nmax];
int main()
{
int i,n,lgmax,imax,j,m;
//cout<<3*sizeof(a)/1024.0/1024.0;
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
fin.close();
lg[1]=1; t[1]=0;
for(i=2;i<=n;i++)
{
lg[i]=1; t[i]=0;
for(j=1;j<=i-1;j++)
if(a[j]<a[i] && lg[j]+1>lg[i])
{
lg[i]=lg[j]+1;
t[i]=j;
}
}
lgmax=0;
for(i=1;i<=n;i++)
if(lg[i]>lgmax) {lgmax=lg[i]; imax=i;}
m=1; sol[1]=a[imax];
while(t[imax]!=0)
{
imax=t[imax];
m++; sol[m]=a[imax];
}
fout<<lgmax<<"\n";
for(i=m;i>=1;i--) fout<<sol[i]<<" ";
fout.close();
return 0;
}