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 i=0;
    uint32_t result = 0;
    while(i < 32){
        if(reg & (1u << i)){
            result |= 1u<<(i/2);
        }
        i+=2;
    }
    return result;
}

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