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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("subsir.in");
ofstream g("subsir.out");
int a[100001],l[100001],t[100001],n;
int main()
{
int i,j,max,poz,max1=-1,poz1;
f>>n;
for(i=1;i<=n;i++)
f>>a[i];
t[n]=-1;
l[n]=1;
for(i=n-1;i>=1;i--)
{
max=0;
for(j=i;j<=n;j++)
if(l[j]>max&&a[j]>a[i])
{
max=l[j];
poz=j;
}
l[i]=max+1;
if(l[i]>max1)
{max1=l[i];
poz1=i;
}
if(l[i]>=2)
t[a[i]]=a[poz];
else
t[a[i]]=-1;
}
g<<l[poz1]<<'\n';
i=a[poz1];
while(t[i]!=-1)
{
g<<i<<" ";
i=t[i];
}
g<<i;
return 0;
}