type ocenka=1..5;var a: array [1..12] of ocenka;i:integer;s: real;begins:=0;for i:=1 to 12 do beginreadln(a[i]);s:=s+a[i];end;writeln(s/12:0:3);end.
type ocenka=1..5;
var a: array [1..12] of ocenka;
i:integer;
s: real;
begin
s:=0;
for i:=1 to 12 do begin
readln(a[i]);
s:=s+a[i];
end;
writeln(s/12:0:3);
end.