#include <stdint.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdio.h>

typedef struct {
  void * ptr;
  uintmax_t len;
} buf_t;

inline uintmax_t file_size(int fd) {
  struct stat f_stat;
  fstat(fd, &f_stat);
  return f_stat.st_size;
}

inline buf_t map_file(int fd) {
  uintmax_t size = file_size(fd);
  return (buf_t){mmap(NULL, size, PROT_READ, MAP_PRIVATE | MAP_POPULATE, fd, 0), size};
}

inline buf_t alloc(uint64_t size) {
  return (buf_t){mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_POPULATE | MAP_ANONYMOUS, 0, 0), size};
}

inline uint64_t true_write(int fd, buf_t buf) {
  return write(fd, buf.ptr, buf.len);
}

inline void * end(buf_t t) { return t.ptr + t.len;}

typedef uint8_t v8b_t __attribute__((__vector_size__(8)));

inline uint8_t next_bit(uint64_t t, uint64_t i) { return (((t >> i++) & 1) + '0');}

inline buf_t bit_to_byte(buf_t in) {
  buf_t out = alloc(in.len << 3);
  uint8_t * in_it = in.ptr, * end_in = end(in); v8b_t * out_it = out.ptr;
  do {
    uint8_t t = *in_it, i = 0;
    *out_it = (v8b_t){next_bit(t, i++), next_bit(t, i++), next_bit(t, i++), next_bit(t, i++),
                      next_bit(t, i++), next_bit(t, i++), next_bit(t, i++), next_bit(t, i++)};
  } while(++out_it, ++in_it != end_in);
  return out;
}

int32_t main(void) {
  return !!true_write(STDOUT_FILENO, bit_to_byte(map_file(STDIN_FILENO)));
}