program example (input,output);
var i : integer ;
var a : array [1..5] of real ;

function test ( a : array [1..5] of real ) : integer;
var sum : real ;
var i : integer ;
begin
  i:=5;
  sum:=0;
  while (i>0) do
    begin
      sum:=sum+a[i];
      i:=i-1
    end;
  test:=sum
end;

begin
  i:=1;
  while (i<=5) do
    begin
      read(a[i]);
      i:=i+1
    end;
  write(test(a))
end.