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#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,v[100001],i,j,tata[100001],l[100001],sol[100001],lMax,poz;
int main()
{
fin>>n;
for(i=1;i<=n;i++){
fin>>v[i];
l[i]=1;
}
lMax=1;
for(i=2;i<=n;i++){
for(j=i-1;j>=1;j--){
if(v[i]>v[j]&&l[i]<l[j]+1){
l[i]=l[j]+1;
tata[i]=j;
}
}
if(l[i]>lMax){
lMax=l[i];
poz=i;
}
}
for(i=lMax;i>0;i--){
sol[i]=v[poz];
poz=tata[poz];
}
fout<<lMax<<'\n';
for(i=1;i<=lMax;i++)
fout<<sol[i]<<" ";
return 0;
}