#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int main()
{int n,a[2000000],b,maxi=0,x;
    fin>>n;
    b=1;
    for (int i=1;i<=n;i++)
        fin>>a[i];

    for (int i=n-1;i>=1;i--)
    {
    if (a[i]==a[i+1]-1)
        b++;
    else
        b=1;
    if (b>maxi)
    {
        maxi=b;
        x=i;
    }
    }
    fout<<maxi<<'\n';
    for (int i=x;i<=x+maxi-1;i++)
    fout<<a[i]<<' ';
    return 0;
}