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)
    {
        for (int i = 1; i < 16; i <<= 1)
        {
            reg |= (reg >> i);
        }
        
        return reg - (reg >> 1); // OG register - for reg fill with all 1 sfhit to the right by 1 (1010 - 0111)
    }
    return 0;
}

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

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

Solving Approach