#include <iostream>
#include <limits.h>
using namespace std;

int main()
{
    int n,k=0,m,cif,a[100],b[100];
    cout<<"n=";
    cin>>n;
    for (int i=1; i<=n; i++)
    {
        m=INT_MIN;
        cout<<"a=";
        cin>>a[i];
        while (a[i])
        {
            cif=a[i]%10;
            a[i]/=10;

            if (m<cif)
                m=cif;
        }
        b[k++]=m;
    }
    for (int i=0; i<k; i++)
        cout<<b[i]<<" ";

    return 0;
}