Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if(reg==0) return 0;
    int pos;
    for(int i=15; i>0; i--){
        if(reg & (1<<i)){
            pos=i;
            break;
        }
    }
    return (1<<pos);
}

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

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

Solving Approach