#include <stdio.h>
#include <stdint.h>
uint32_t extract_even_bits(uint32_t reg) {
// Your code here
uint16_t final_=0;
for(uint8_t i=0;i<32;i=i+2)
{
uint32_t temp=(reg>>i)&1;
final_|=(temp<<(i/2));
}
return final_;
}
int main() {
uint32_t reg;
scanf("%u", ®);
printf("%u", extract_even_bits(reg));
return 0;
}