Program string_20;
uses crt;
var
s: string;
kol, m: integer;
i, nd: byte;
begin
clrscr;
write('введите произвольную строку ');
readln(s);
nd := 0;
for i := 1 to length(s) do
if s[i] in ['0' .. '9'] then
inc(nd);
writeln(nd);
readln;
end.