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
  uint16_t mask = 0x8000; 
  if(reg == 0) {
    return 0;
  }
  for(int i = 0; i < 15; i++) {
    if((mask & reg) != 0) { 
      return mask;
    }
    mask >>= 1; 
  }
}

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

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