var s,a,i: integer;
begin
s:=0;
for i:=1 to 10 do
readln(a);
s:=s+a;
end;
write('средний : ',s/10);
end.
var s,a,i: integer;
begin
s:=0;
for i:=1 to 10 do
begin
readln(a);
s:=s+a;
end;
write('средний : ',s/10);
end.