program Project2;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var inp,outp: textfile;
    i,j,l,a,n,k,min,max: integer;
    ans: array[1..9000000]of integer;
    s:array[1..9000000]of integer;
    w: array[-100..1000000]of integer;

{procedure sort;
var nm: integer;

begin
   for i:=1 to k do
      begin
      min:=ans[i];
      for j:=i+1 to k do
         if ans[j]<min then begin min:=ans[j];nm:=j;end;
          ans[nm]:=ans[i];
      ans[i]:=min;
      end;

end;}

begin
   assignfile(inp,'Task4.in');
   assignfile(outp,'Task4.out');
   reset(inp);
   rewrite(outp);
   readln(inp,n);
   k:=1;
   for i:=1 to n do
      for j:=1 to n do
         for l:=1 to n do
            begin
               a:=i+j+l;
               ans[k]:=a; inc(k);
               a:=i+j-l;
               ans[k]:=a; inc(k);
               a:=i+j*l;
               ans[k]:=a; inc(k);
               a:=i-j-l;
               ans[k]:=a; inc(k);
               a:=i-j+l;
               ans[k]:=a; inc(k);
               a:=i-j*l;
               ans[k]:=a; inc(k);
               a:=i*j*l;
               ans[k]:=a; inc(k);
               a:=i*j-l;
               ans[k]:=a; inc(k);
               a:=i*j+l;
               ans[k]:=a; inc(k);
            end;
   {sort;}

   for i:=1 to k do
      inc(w[ans[i]]);
   max:=-1000;
   for i:=-99 to 1000000 do
      if w[i]>w[max] then max:=i;
   writeln(outp,max);
   closefile(inp);
   closefile(outp);

end.