Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    uint8_t count = -1;
    while(reg)
    {
        count++;
        if((reg & 0x8000) >> 15)
        {
            break;
        }
        reg = (reg << 1);
    }
    return (1<<(15-count)) & 0xFFFF;
}

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

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

Solving Approach