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#include <fstream>
#include <queue>
#include <string>
#include <cstring>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[100005],n,dp[100005],Max,sol[1000001],prec[100005];
int main()
{
fin>>n;
for(int i=1;i<=n;i++) fin>>a[i];
dp[1]=1;
for(int i=2;i<=n;i++)
{
int m=0;
Max=0;
for(int j=1;j<i;j++)
if(a[i]>a[j] && dp[j]>Max) Max=dp[j],m=j;
dp[i]=Max+1;
prec[i]=m;
}
Max=0;
int k,t=1;
for(int i=1;i<=n;i++)
if(dp[i]>Max) Max=dp[i],k=i;
while(k!=0)
{
sol[t]=a[k];
k=prec[k];
t++;
}
fout<<Max<<'\n';
for(int i=t-1;i>=1;i--) fout<<sol[i]<<" ";
}