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

int
main(int argc, char* argv[])
{
    char *file_name = argv[1];
    int outpt_file = open(file_name, O_WRONLY | O_TRUNC | O_CREAT, S_IWUSR | S_IRUSR);
    if (outpt_file) {
        return 1;
    }

    unsigned curr;
    while (scanf("%u", &curr) == 1) {
        size_t n = sizeof(curr);
        unsigned char s[n];
        int it = n - 1;
        while (it >= 0) {
            s[it--] = curr;
            curr >>= CHAR_BIT;
        }
        if (write(outpt_file, s, n) != n) {
            return 1;
        }
    }

    close(outpt_file);
    return 0;
}