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#include <iostream>
#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100001],d[100001],n,i,j,mx,pmax,a[100001];
int main()
{
f>>n;
for(i=1;i<=n;i++) f>>v[i];
for(i=1;i<=n;i++) d[i]=1;
for(i=2;i<=n;i++)
for(j=1;j<i;j++)
{
if(v[j]<v[i])
{
d[i]=max(d[i],d[j]+1);
if(d[i]>mx) {pmax=i;mx=d[i];}
}
}
g<<mx<<endl;
i=mx;j=pmax;a[mx]=v[j];
while(i>1)
{
if(d[j-1]==d[j]-1 && v[j-1]<v[j])
{
i--;
j--;
a[i]=v[j];
}
else j--;
}
for(j=1;j<=mx;j++) if(a[j]!=a[j-1]) g<<a[j]<<' ';
}