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
    bool first=true;
    for (int i=15;i>=0;i--){
        if((first) && (reg&(1<<i))){
            first =false;
        }
        else if(reg&(1<<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