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
    if (reg == 0) return 0;
    uint8_t count = 0;

    while ((reg & 0x8000) == 0) {  
        reg <<= 1;
        count++;
    }
    return (uint16_t)(0x8000 >> count);
}

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

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

Solving Approach