Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
   reg |=(reg>>1);
   reg|=(reg>>2);
   reg|=(reg>>4);
   reg |=(reg>>8);
    reg =reg-(reg>>1);
    return reg;
}

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

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

Solving Approach