/*   This program reformats the standard input, except for the first
     line which contains the new maximum line length, line_length, to
     at most line_length characters per line. The program writes to
     the standard output. Lines are broken at spaces.              */

#include <stdio.h>
#include <stdlib.h>

#define MAX_WORD_LENGTH 80         /* max length of word in input */

main()
{
     int line_length,              /* max length of line in output */
         curr_line_length = 0,     /* number of chars printed so far
                                      in current line */
         word_length;              /* length of current word */
     char word[ MAX_WORD_LENGTH + 1 ]; /* buffer to read word
                                       + 1 is for terminating '\0' */

     scanf( "%d", &line_length );  /* 1st line of input has line
                                      length */
     while ( scanf( "%s", word ) != EOF ) {
          /* determine length of current word */
          for ( word_length = 0; word[ word_length ] != '\0';
               word_length++ )
               ;
          if ( word_length > line_length )
              printf( "\nERROR: word length exceeds line length" );
          if ( curr_line_length == 0 ) { /* first word to write? */
               printf( "%s", word );
               curr_line_length = word_length;
          }
          else {
               /* +1 is for space */
               curr_line_length += word_length + 1;
               /* if word won't fit on current line,
                  start a new line */
               if ( curr_line_length > line_length ) {
                    printf( "\n%s", word );
                    curr_line_length = word_length;
               }
               else
                 /* word fits, add space and word to current line */
                    printf( " %s", word );
          }
     }

     return EXIT_SUCCESS;
}