Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > Flip Bit K

Flip Bit K

Difficulty: 800 2000 ms 128 MB

bitwise

Print N with bit K (0-indexed) flipped.

Input: one line with two integers N and K.

Output: N ⊕ 2K.

Constraints:

  • 0 ≤ N ≤ 1018
  • 0 ≤ K ≤ 62

Sample Tests

Input 1
10 0
Output 1
11
Input 2
10 1
Output 2
8

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