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 high = 0;
    if(reg == 0)
        return reg;
        
    for(int i=0; i<16; i++)
    {
        if(reg & 1)
            high = i;
        reg >>= 1;
    }
    reg = 0;
    reg |= (1U << high);
    return reg;
    return 0;
}

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

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

Solving Approach