Pieces - 2

The segment length L is cut into the largest number of units of length - the natural numbers, of which it is impossible to lay down a single triangle. Find the number of possible options for cutting. (Two cutting are different, if ordered arrays of lengths of their parts differ by at least one element).

Input

The value of L (4 <= L <= 200).

Output

The only number - the number of options for cutting.

Examples