Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) 
{
    if(reg == 0)
    return reg;
    for(int i=0; i<16; i++)
    {
        reg &= ~(1<<i);
        if(reg == 0)
        {
            reg |= (1<<i);
            break;
        }
    }
    return reg;
    
}

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

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

Solving Approach