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
    if(reg==0)return reg;
    // int i=15;
    // while(!(reg&(1<<i)))i--;
    // reg&=(1<<i);
    // return reg;
    uint16_t result=1u<<15;
    while((reg&result)==0)result>>=1;
    return result;
}

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

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