Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if(!reg) return 0;
    // Your logic here
    uint8_t highest_bit;
    for(uint16_t i = 15; i >= 0; i--)
    {
      if((1u << i) & reg){
        highest_bit = i;
        break;
      }  
    }
    reg = (1u << highest_bit) & reg;
    return reg;
}

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

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

Solving Approach