#include<fcntl.h>
#include<sys/stat.h>
#include<unistd.h>
#include<stdio.h>

int main(int argc, char ** argv){
	int file_descriptor = open(argv[1], O_RDONLY);
	if(file_descriptor < 0){
		perror("open");
		return 1;
	}
	struct stat fs;
	// TODO:  Check for errors
	fstat(file_descriptor, &fs);
	size_t begin = fs.st_size/3;
	size_t end = 2 * fs.st_size/3;
	// TODO:  Check for errors
	lseek(file_descriptor, begin, SEEK_SET);
	char data[end-begin];
	// TODO:  Check for errors
	read(file_descriptor, data, end-begin);
	// TODO:  Check for errors
	close(file_descriptor);
	write(1, data, end-begin);
	return 0;
}