program Project2;
{$APPTYPE CONSOLE}
var b,c,i,n:integer;
a:array[1..100] of int64;

begin
assign(input,'jamming.dat');
reset(input);
assign(output,'jamming.sol');
rewrite(output);
readln(n);
a[1]:=1;
a[2]:=2;
for i:=3 to n do begin
a[i]:=a[i-2]+a[i-1];
end;
b:=a[n]*a[n];
writeln(b);
close(input);
close(output);
end.