#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main (int argc, char* argv[]) {
	if (argc != 2) perror ("gay");
	int pid,fd[2];
	pipe(fd);
	pid=fork();
	if (pid==0) {
		close(fd[0]);
		dup2(fd[1],1);
		execlp("sort","sort","-n","-r",argv[1],(char*) NULL);
		perror ("no ha mutat");
	}
	pid=fork();
	if (pid==0) {
		close(fd[1]);
		dup2(fd[0],0);
		execlp("head","head","-n","1",argv[1],(char*)NULL);
		perror("no ha mutat");
	}
	close(fd[0]);
	close(fd[1]);
	while(waitpid(-1,NULL,0)>0);
}