Set a bit
Execution time limit is 1 second
Runtime memory usage limit is 128 megabytes
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
One line contains two integers a and k (0 ≤ a ≤ 10^9
). The least significant bit of a is a bit number zero.
Output
Print the number a with a set k-th bit.
Examples
Input #1
Answer #1
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