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

int
main(int argc, char *argv[])
{
    int fd;
    if ((fd = open(argv[1], O_RDWR)) == -1) {
        return 1;
    }

    off_t min_ind = -1, cnt = 0;
    long long min, tmp;
    while (read(fd, &tmp, sizeof(tmp)) == sizeof(tmp)) {
        if (min_ind == -1 || tmp < min) {
            min = tmp;
            min_ind = cnt;
        }

        cnt += sizeof(tmp);
    }

    if (lseek(fd, min_ind, SEEK_SET) == -1) {
        return 0;
    }

    if (min != LLONG_MIN) {
        min = -min;
    }

    if (write(fd, &min, sizeof(min)) != sizeof(min)) {
        return 1;
    }

    close(fd);
    return 0;
}