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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int dx[]={0,0,1,-1},dy[]={1,-1,0,0};
int v[100002],dp[100002],t[100002];
int n,i,j,maxx,poz;
void rec(int poz)
{
if(poz>0)
{
rec(t[poz]);
fout<<v[poz]<<" ";
}
}
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>v[i];
for(i=1;i<=n;i++)
{
dp[i]=1;
for(j=i-1;j>=1;j--)
if(v[i]>v[j]&&dp[i]<dp[j]+1)
{
dp[i]=dp[j]+1;
t[i]=j;
if(maxx<dp[i])
{
maxx=dp[i];
poz=i;
}
}
}
fout<<maxx<<'\n';
rec(poz);
return 0;
}