2. Bit Toggle

#include <stdio.h>

int toggleFifthBit(int n) {
    //Dùng if-else
    int pos_val = (n>>5) & 1;
    int res;
    if(pos_val == 1){
        res = n&~(1<<5);
    }else if(pos_val == 0){
        res = n|(1<<5);
    }
    return res;
    //dùng XOR
    //return n ^ (1<<5);
}

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