Toggle the bit
Given an integer
n, you are asked to toggle its i-th bit (turn 0 into 1 and 1 into 0).Input
The input contains two integers
n (1 ≤ n ≤ ) and i separated by a space. It’s guaranteed that i is smaller than the length of the binary representation of n. Output
The program should print the resulting number after toggling the
i-th bit of n.Examples
Input | Output |
9 2 | 13 |
9 3 | 1 |
Explanation
- 9 → 1001 ⇒ toggle bit at index 2 ⇒ 1101 ⇒ 13
- 9 → 1001 ⇒ toggle bit at index 3 ⇒ 0001 ⇒ 1
Constraints
Time limit: 2 seconds
Memory limit: 512 MB
Output limit: 1 MB