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
    int j;
    for(int i = 0;i<16;i++){
        if (reg & (1U<<i)){
       
        j=i;}
        reg &= ~(1U<<i) ;
    }
    if (j != 0){
    reg |= (1U<<(j));}
    return reg;
}

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

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

Solving Approach