function assess(A, B, X, Y: longint): longint;
begin
    (* insert your code here *)
    assess := 42;
end;


var
    A,B,X,Y : longint;
    fr, fw  : text;

begin
    assign(fr, 'input.txt');
    assign(fw, 'output.txt');
    reset(fr);
    rewrite(fw);
    readln(fr, A, B, X, Y);

    writeln(fw, assess(A, B, X, Y));
    close(fr);
    close(fw);
end.