Problems
Change the one
Change the one
Number n is given. Using bit operations, replace the rightmost bit one in the binary notation to zero.
Input
One number n (1 ≤ n ≤ 108).
Output
Print one changed number.
Input example #1
1
Output example #1
0
Input example #2
18
Output example #2
16
Input example #3
196
Output example #3
192