const
n=20;
var
a:array[1..n]of real;
i:integer;
ns,cs:real;
begin
ns:=0;
cs:=0;
for i:=1 to n do
begin
readln(a[i]);
if odd(i) then
ns:=ns+a[i]
else
cs:=cs+a[i];
end;
writeln(ns/10,' ',cs/10)
end.
const
n=20;
var
a:array[1..n]of real;
i:integer;
ns,cs:real;
begin
ns:=0;
cs:=0;
for i:=1 to n do
begin
readln(a[i]);
if odd(i) then
ns:=ns+a[i]
else
cs:=cs+a[i];
end;
writeln(ns/10,' ',cs/10)
end.