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#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, v[100005], best[100005], p[100005], rez, irez;
int main()
{
int i, j;
fin>>n;
for(i=1; i<=n; ++i)
fin>>v[i];
for(i=n; i>=1; --i){
best[i]=1;
p[i]=n+1;
for(j=i+1; j<=n; ++j)
if(v[i]<v[j] && best[i]<best[j]+1){
best[i]=best[j]+1;
p[i]=j;
}
}
for(i=1; i<=n; ++i)
if(best[i]>rez){
rez=best[i];
irez=i;
}
fout<<rez<<'\n';
for(i=irez; i<=n; i=p[i])
fout<<v[i]<<' ';
return 0;
}