program Project1;
{$APPTYPE CONSOLE}
var
a:array[1..10] of integer;
i:integer;
max,suma:integer;
ser,r:real;
begin
for I := 1 to 10 do
readln(a[i]);
max:=a[1];
suma:=0;
for I := 1 to 10 do
if max<a[i] then
max:=a[i];
for I := 1 to 10 do
suma:=suma+a[i];
ser:=suma/10;
r:=max-ser;
writeln('raznica=',r:0:2);
readln;
end.