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 out = 0;
    for(int i =0; i<32; i+=2){
        if(reg & (1U<<i)){
            out|=(1U<<(i/2));
        }
    }
    return out;  
}

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