Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    uint32_t tmp = 1;
    uint32_t cnt = 0;
    while(tmp <= reg)
    {
        tmp = 1 << cnt;
        cnt++; 
    }
    return 1 << (cnt - 2);
}

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

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