Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    int i = 15;
    while(i >= 0)
    {
        if((reg >> i) == 1)
        {
            break;
        }
        else
        {
            i--;
        }
    }

    i--;
    while(i >=0)
    {
        reg &= ~(1 << i);
        i--;
    }
    return reg;
}

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

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

Solving Approach