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;
    int i = 0;
    for(int j = 0;j<32;j+=2)
    {
        if((reg>>j)&1)
        {
            val |= (1<<i);
        }
        i++;
        // if(j%2 == 0)
        // {
        //     val |= ((reg>>j)&1)<<i;
        //     i++;
        // }
    }
    return val;
}

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