Keep Only the Highest Set Bit

Code

#include <stdio.h>
#include <stdint.h>

// Complete the function
uint16_t highest_set_bit(uint16_t num) {
    // Your logic here
    if(num==0) return 0;
    uint16_t offset=0,numBits=16;
    while(numBits){
        numBits>>=1;
        int a = (num>>(numBits));
        if(a){
            num>>=(numBits);
            offset+=numBits;
        } 
        else{
            num&=((1<<numBits)-1);
        } 
    }
    return 1<<offset;
}

int main() {
    uint16_t reg;
    scanf("%hu", &reg);

    uint16_t result = highest_set_bit(reg);
    printf("%hu", result);
    return 0;
}

Solving Approach