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
    uint16_t res=0;
    for (int i=0;i<=16;i++)
    {
        if(reg & (1 << (i*2)))
            res |= (1<<(i));
    }
    return (uint32_t)res;
    
}

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