#include <iostream>

using namespace std;


int nrmaxim(int n)
{
    int aux=n;
    int nrcif=0;
    while(aux!=0)
    {
        nrcif++;
        aux=aux/10;

    }
    int p=1;
    for(int i=1;i<=nrcif;i++)
        p=p*10;
    long long numarnou=n*p+n;
    int max=n;
    int numar=0;
    for(int i=1; i<=nrcif;i++)
    {
        numar=numarnou%p;
        if(numar>max)
            max=numar;
        numarnou=numarnou/10;

    }



    return max;


}














int main()
{
    cout<<nrmaxim(123456789);
    return 0;
}