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 leftmost_set_bit_pos = 0;
    for (uint16_t i = 0; i < 16; i++){
        if (reg & (1 << i)){
            leftmost_set_bit_pos = (leftmost_set_bit_pos > i) ? leftmost_set_bit_pos : i;
        }
    }
    return (1 << leftmost_set_bit_pos);
}

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

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

Solving Approach