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
    int count = 0;
    uint32_t result = 0;
    for (int i = 0; i < 32; i += 2){
        if (reg & (1UL << i)){
            result |= (1UL << count);
        }
        count ++;
    }
    return result;
}

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