#include "iostream.h"
void main()
{
?  int a,n,i=1,sn,tn;
    cin>>a,n=10;
    cout<<a;
    while(i<=n)
    {++i;
    cout<<tn=tn+a,sn=sn+tn,a=a*10;
}
    cout<<"a+aa+aaa+...="<<sn;
}