{ Return 42 example from lab pdf }
program return42;

var x : integer;

function return42(n : integer) : integer;
begin
    if n > 42 then
        return42 := return42(n-1)
    else begin
        return42 := n;
        while return42 < 42 do return42 := return42 + 1
    end
end;

begin
    readln(x);
    writeln(return42(x))
end.