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==0){
        return 0;
    }
    uint16_t mask=0x8000;
    
    for(; (reg&mask)==0;mask=(mask>>1)){
      
    }

    return reg&mask;

}

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

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

Solving Approach