Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if(reg == 0 )
        return 0;
    int i = 0 ; 
    while(reg != 1)
    {
        reg >>= 1;
        i++;
    }
    return (uint16_t)1 << i;
}

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

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

Solving Approach