program S1;
{$APPTYPE CONSOLE}
label 1;
var s,n,Nat,m:integer;
begin
writeln('Vvedit vagu Darynky');
readln(n);
Nat:=n-5;
1:writeln('Vvedit vagu cukerok v kg');
readln(m);
if m<Nat+n then begin
writeln('Zamala vaga cukerok');
goto 1;end else
S:=m-(Nat+n);
writeln(s);
readln;
end.