22. Extract Even Bits Only from 32-bit Register

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



uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint32_t ret = 0;
    for (int i=0; i<= 15; i++) {
        ret |= ((reg >> i*2) & 1) << i;
    }
    return ret;
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    printf("%u", extract_even_bits(reg));
    return 0;
}