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#include <stdio.h>

int main(int argc, char **argv)

{

        FILE  *fd;

        int c, i, j, width;

        unsigned long word;

        if(argc < 3)

                error("no input file specified");

        width = atoi(argv[1]);

        fd = fopen( argv[2], "r" );

        while (!feof(fd)) {

                j = 0;

                word = 0;

                while (j < width) {

                        c = fgetc(fd);

                        if (c == EOF) {

                                c = 0;

                        }

                        word = (word << 8) + c;

                        j++;

                }

                if(width == 1)

                        printf("%.2lx\n", word);

                else if(width == 2)

                        printf("%.4lx\n", word);

                else

                        printf("%.8lx\n", word);

        }

        return 0;

}