Problems
Set a bit
Set a bit
Two integers a and k are given. Print the number that is obtained from а by setting the value of k-th bit to 1.
Input data
One line contains two integers a and k (0 ≤ a ≤ 10^9). The least significant bit of a is a bit number zero.
Output data
Print the number a with a set k-th bit.
Examples
Input example #1
5 1
Output example #1
7