#include <stdio.h>

#include <unistd.h>

#include <sys/wait.h>

#include <time.h>

int
main(int argc, char
  const * argv[]) {
  int fd[2];
  struct tm * tt;
  pipe(fd);
  if (!fork()) {
    if (!fork()) {
      if (!fork()) {
        close(fd[0]);
        time_t cur_time = time(NULL);
        write(fd[1], & cur_time, sizeof(cur_time));
        write(fd[1], & cur_time, sizeof(cur_time));
        write(fd[1], & cur_time, sizeof(cur_time));
        close(fd[1]);
        return 0;
      }
      close(fd[1]);
      wait(NULL);
      time_t cur_time;
      read(fd[0], & cur_time, sizeof(cur_time));
      tt = localtime( & cur_time);
      printf("D:%02d\n", tt - > tm_mday);
      close(fd[0]);
      return 0;
    }
    close(fd[1]);
    wait(NULL);
    time_t cur_time;
    read(fd[0], & cur_time, sizeof(cur_time));
    tt = localtime( & cur_time);
    printf("M:%02d\n", tt - > tm_mon + 1);
    close(fd[0]);
    return 0;
  }
  close(fd[1]);
  wait(NULL);
  time_t cur_time;
  read(fd[0], & cur_time, sizeof(cur_time));
  tt = localtime( & cur_time);
  printf("Y:%04d\n", tt - > tm_year + 1900);
  close(fd[0]);
  return 0;
}