Reset a bit
Execution time limit is 1 second
Runtime memory usage limit is 64 megabytes
Given two integers a and k. Find the number that is obtained from a by reseting the value of k-th bit to 0. The least significant bit has number 0.
Input
Two numbers a and k (0 ≤ a ≤ 10^9).
Output
Print the number with reset k-th bit.
Examples
Input #1
Answer #1
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