Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    uint16_t dum = reg;
    reg =0;
    uint16_t count=0;
    while(dum != 0){
        dum = dum/2;
         ++ count  ;
    }
    dum = dum | (1 << count-1 );
    reg |= dum;
    return reg;
}

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

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

Solving Approach