Check Bit K
Is bit K (0-indexed from the least significant) set in N?
Input: one line with two integers N and K.
Output: YES or NO.
Constraints:
- 0 ≤ N ≤ 1018
- 0 ≤ K ≤ 62
Sample Tests
Input 1
10 1
Output 1
YES
Input 2
10 2
Output 2
NO
Discussion (opens after you solve — no spoilers before)
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