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

int main(int argc, char **argv)
{
    int fd = open(argv[1], O_RDWR);
    int counter, est = 0, tmp;
    long long length = 0;
    while(read(fd, &counter, sizeof(int))){
        length++;
    }
    int i;
    for (i = 0; i < length; i++){
        read(fd, &counter, sizeof(int))
        if(counter < 0) {
            est++;
            lseek(fd, 0, SEEK_END);
            write(fd, &counter, sizeof(int));
            lseek(fd, i + 1, SEEK_SET);
        }
    }
    lseek(fd, 0, SEEK_SET);
    for (i = 0; i < length; i++){
        read(fd, &counter, sizeof(int))
        if(counter >= 0) {
            lseek(fd, 0, SEEK_END);
            write(fd, &counter, sizeof(int));
            lseek(fd, i + 1, SEEK_SET);
        }
    }

    for (i = 0; i < length; i++){
        lseek(fd, length + est - i - 1, SEEK_SET);
        read(fd, &counter, sizeof(int))
        lseek(fd, i, SEEK_SET);
        write(fd, &counter, sizeof(int));
    }
    close(fd);
    return 0;
}