Cycle shifts

Lets write the decimal integer n in binary notation and create all its left cycle shifts where first digit of the number goes to the end.

For example, if n = 11, than it will be 1011 in binary notation, cycle shifts are 0111, 1110, 1101, 1011. So the maximal value m among all received numbers equals to 1110[2] = 14[10].

For the number n find the maximal value of m.

Input

One number n (1 ≤ n ≤ 2 ·10^9).

Output

One number m.

Examples