2. Bit Toggle

#include <stdio.h>
#define TOGGLE_MASK 1

int toggleFifthBit(int n) {
    if (((n>>5)& TOGGLE_MASK) == 1){
        n&= ~(1<<5);
    }
    else{
        n|= (1<<5);
    }
    return n;
}

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