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
    uint16_t highest;
    for(uint16_t i =0 ; i<16 ;i++)
    {
        if( reg & ( 1<<i ))
        {
            if( highest <= i)
            {
                highest = i;
            }
        }
    }

    for(uint16_t i =0;i< highest;i++)
    {
        reg &= ~(1<<i);
    }

    
    return reg;
}

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

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

Solving Approach