Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
  uint16_t a = 1<<15;
  if(reg == 0)
  return reg;
  //return a;
  while((a & reg) == 0){
    a >>=1;
  }
  return a;
}

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

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

Solving Approach