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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],l[nmax],t[nmax],sol[nmax];
int main()
{
int i,n,imax,j,m,lgmax;
fin>>n;
for(i=1;i<=n;i++)fin>>a[i];
fin.close();
l[1]=1;t[1]=0;
for(i=2;i<=n;i++)
{
l[i]=1;t[i]=1;
for(j=1;j<=i;j++)
if(a[j]<a[i] && l[i]+1>l[i])
{
l[i]=l[j]+1;
t[i]=j;
}
}
lgmax=0;
for(i=1;i<=n;i++)
if(l[i]>lgmax){lgmax=l[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-1;i>=1;i--)
fout<<sol[i]<<"\n";
fin.close();
fout.close();
return 0;
}