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#include <fstream>
#define NM 100003
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,lmax,p,j,max1,k;
int a[NM],l[NM],r[NM],poz[NM];
int main()
{
f>>n;
for(i=1;i<=n;i++) f>>a[i];
for(i=n;i>=1;i--){
lmax=0; p=0;
for(j=i;j<=n;j++)
if(a[i]<a[j]&&lmax<l[j]){
lmax=l[j]; p=j;
}
if(lmax==0) { l[i]=1; poz[i]=-1; }
else { l[i]=lmax+1; poz[i]=p; }
}
max1=0; p=0;
for(i=1;i<=n;i++)
if(max1<l[i]) { max1=l[i]; p=i; }
g<<max1<<'\n';
while(p!=-1){
r[++k]=a[p]; p=poz[p];
}
for(i=1;i<=k;i++) g<<r[i]<<' ';
return 0;
}