program test;
uses crt;
var a, b: integer;
count, sum: integer;
arithm: real;
Begin
write('A = '); readln(a);
while (a>=9) do
begin
sum:=sum+(a mod 10);
a:=a div 10;
inc(count);
end;
arithm:=(sum+a)/(count+1);
writeln('Arithm = ',arithm);
End.