#include <stdio.h>
#include <stdint.h>
uint32_t extract_even_bits(uint32_t reg) {
// Your code here
uint32_t result = 0;
int out_pos = 0; // position in compressed result
for (int i = 0; i < 32; i += 2) {
uint32_t bit = (reg >> i) & 1U; // extract bit at position i
result |= (bit << out_pos); // place at compressed position
out_pos++;
}
return result;
}
int main() {
uint32_t reg;
scanf("%u", ®);
printf("%u", extract_even_bits(reg));
return 0;
}