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;
      int highest = -1;
    for (int i = 15; i >= 0; i--) { // check from highest bit down
        if (reg & (1 << i)) {
            highest = i;
            break;
        }
    }

    if (highest >= 0)
        reg = (1 << highest);
    else
        reg = 0;

    return reg;
    return reg;
}

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

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

Solving Approach