#include <stdio.h>
#include <stdint.h>
uint32_t extract_even_bits(uint32_t reg) {
// Your code here
uint16_t temp;
uint16_t value = 0;
for(int i=0;i<31;i=i+2){
temp = (reg >> i) & 1;
value = value | (temp<<(i/2)) ;
}
return value;
}
int main() {
uint32_t reg;
scanf("%u", ®);
printf("%u", extract_even_bits(reg));
return 0;
}