program stock;
var
w:array[1..1000] of real;
i,j,k,m,n,t1,tol,c:longint;
min,max,temp,ans,ans1:real;
flag:boolean;
begin
assign(input,'stock.in');reset(input);
assign(output,'stock.out');rewrite(output);
readln(n);
for i:=1 to n do
 read(w[i]);
 readln(m);
 min:=maxlongint;
 for i:=1 to n-1 do
  for j:=i+1 to n do
   begin
   inc(tol);
   if w[i]<m then flag:=true;
 t1:=trunc(m/w[i]);temp:=t1*w[j];ans:=temp-m;
 if ans>max then max:=ans;
 end;
if not flag then ans:=0 else ans:=max;
writeln(ans:0:3);
for i:=1 to n-1 do
 for j:=i+1 to n do
 if w[i]<w[j] then inc(c);
 ans1:=c/tol;
 writeln(ans1:0:3);
 close(output);
 end.