#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("turn.in");
ofstream fout("turn.out");
long long n,k,i,j,l,ok,v[10000],y;
int main()
{
fin>>n>>k;
for(i=1;i<=n;i++)fin>>v[i];
i=1;
while(i<=n)
{
    ok=0;
    l=1;
    if(v[i]==v[i+1])
    {
        j=i;
        while(v[j]==v[j+1]&&j+1<=n)
        {
            l++;j++;
        }
    }
    if(l>=k)
    {
        for(y=j+1;y<=n;y++)v[y-l]=v[y];
        n-=l;
        ok=1;
    }
    if(ok==1)i=1;
    else i++;
}
fout<<n<<endl;
for(i=1;i<=n;i++)
{
    fout<<v[i]<<" ";
}
    return 0;
}