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#include<fstream>
using namespace std;
ifstream f("scmax.in"); ofstream g("scmax.out");
int best[100003],a[100003],maxim,sol=0,poz[100003],p,n;
void dinamic()
{ best[n]=1;
poz[n]=-1;
maxim=1; p=n;
for(int i=n-1;i>=1;--i)
{ best[i]=1; poz[i]=-1;
for(int j=i+1;j<=n;++j)
if(a[i]<a[j] && best[i]<best[j]+1)
{ best[i]=best[j]+1;
poz[i]=j;
if(best[i]>maxim) maxim=best[i],p=i;
}
}
}
void constr()
{ int i;
i=p;
while(i!=-1)
{ g<<a[i]<<" ";
i=poz[i];
}
}
int main()
{ f>>n;
for(int i=1;i<=n;++i) f>>a[i];
dinamic();
g<<maxim<<'\n';
constr();
g.close(); return 0;
}