Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    int pos = 0;
    uint16_t mask ;
    for(int i = 31;i>=0;i--)
    {
        if(reg&(1<<i))
        {
            pos = i;
            break;
        }
    }

    mask = ((1<<pos)-1)<<pos;

    reg &= mask;
    return reg;
    
}

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

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