program paralepiped;
var
s, n: integer;
begin
s := 0;
n := 0;
repeat
write('введите число 0-выход');
readln(x);
s := s + x;
n := n + 1;
until x = 0;
writeln('sr. arifm-e=', s / (n - 1));
end.
program paralepiped;
var
s, n: integer;
begin
s := 0;
n := 0;
repeat
write('введите число 0-выход');
readln(x);
s := s + x;
n := n + 1;
until x = 0;
writeln('sr. arifm-e=', s / (n - 1));
end.