Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    uint16_t a=1;
    a=a<<15;
    uint16_t b;
    for(int i=0;i<16;i++)
    {
         b=a;
         
        if((reg & b )==b)
        {
            reg=reg&b;
           break; 
        }
        a=a>>1;
    }
    

    return reg;
}

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

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

Solving Approach