Program PascalGuru;
var
n: integer;
MAX: integer;
begin
write('Vvedite celoe cislo: ');
readln(n);
MAX := 0;
while n <> 0 do
begin
if n mod 10 > MAX then
MAX := (n mod 10);
n := n div 10;
end;
writeln('MAX= ', MAX);
readln;
end.