#include <stdio.h>
#include <stdint.h>
uint32_t extract_even_bits(uint32_t reg) {
uint8_t get_bit = 0;
uint32_t output = 0;
for(int i = 0; i < 31; i+=2 )
{
get_bit = (reg >> i) & 1;
output |= get_bit << i/2;
}
return output;
// Your code here
}
int main() {
uint32_t reg;
scanf("%u", ®);
printf("%u", extract_even_bits(reg));
return 0;
}