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;
    for(int i=15; i>=0; i--){
        if(reg&(1<<i)){
            pos=i-1;
            break;
        }
    }

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

    return reg;
}

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

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