2. Bit Toggle

#include <stdio.h>

int toggleFifthBit(int n) {
    // toggle 5th bit in the n
    
    return n ^= (1<<5);
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", toggleFifthBit(n));
    return 0;
}

In C, bit positions are 0-indexed.

• 1 << 0 → least significant bit (LSB)
• 1 << 5 → the 6th bit if you count from 1.

If you really want to toggle the 5th bit counting from 0, it 1 << 5 is correct.
If you want to toggle the 5th bit counting from 1, you should use 1 << 4.