Spiderman

Spider-Man is in the top corner of the value of A^0. he length of each of his jump while driving - a constant, and every time he turns on the other side of the angle as far as possible from the top. What is the maximal number of hops it can commit?

Input

One real number A - the angle in degrees with an accuracy of 10^{-6} (A < 180).

Output

Maximum number of hops - a natural number.

Examples