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 val = 0, cnt = 0;
    for(int i = 0; i <= 31; i += 2){
        val |= (((reg >> i) & 1) << cnt);
        cnt++;
    }
    return val;
}

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