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

/* You can use these functions and data structures to transform strings to numbers and used them in arrays
enum place {
  NUZKY, VRTACKA, OHYBACKA, SVARECKA, LAKOVNA, SROUBOVAK, FREZA,
  _PLACE_COUNT
};

const char *place_str[_PLACE_COUNT] = {
        [NUZKY] = "nuzky",
        [VRTACKA] = "vrtacka",
        [OHYBACKA] = "ohybacka",
        [SVARECKA] = "svarecka",
        [LAKOVNA] = "lakovna",
        [SROUBOVAK] = "sroubovak",
        [FREZA] = "freza",
};

enum product {
  A, B, C,
  _PRODUCT_COUNT
};

const char *product_str[_PRODUCT_COUNT] = {
        [A] = "A",
        [B] = "B",
        [C] = "C",
};

int find_string_in_array(const char **array, int length, char *what) {
   for (int i = 0; i < length; i++)
      if (strcmp(array[i], what) == 0)
         return i;
   return -1;
}
*/

/* It is not necessary to represent each working place with a dynamically allocated object.
 * You can store only number of ready places
 * int ready_places[_PLACE_COUNT];
 */

/* It is not necessary to represent each part as a dynamically allocated object.
 * you can have only number of parts for each working phase
 * #define _PHASE_COUNT 6
 * int parts[_PRODUCT_COUNT][_PHASE_COUNT]
 */

int main(int argc, char **argv) {
    /* init your internal structures, mutexes and conddition variables */

    char *line, *cmd, *arg1, *arg2, ch;
    while (1) {
        int s = scanf(" %m[^\n]", &line), s2;
        if (s == 1) {
            if (strncmp(line, "start", 5) == 0) {
                s2 = sscanf(line, "%m[a-zA-Z] %m[a-zA-Z] %m[a-zA-Z]%c", &cmd, &arg1, &arg2, &ch);
                if ((s2 == 3) && (0 == strcmp(cmd, "start"))) {
                    /* start new thread for new worker */
                    /* copy worker name from arg1, the arg1 will be removed at the end of scanf
                     * cycle */
                    /* workers should have dynamic objects, you don't know total number of workers
                     */
                }
                if (s2 >= 3) {
                    free(arg2);
                }
            } else {
                s2 = sscanf(line, "%m[a-zA-Z] %m[a-zA-Z]%c", &cmd, &arg1, &ch);
                if ((s2 == 2) && (0 == strcmp(cmd, "make"))) {
                    /* int product = find_string_in_array(product_str, _PRODUCT_COUNT, arg1);
                     *
                     * if (product>=0) {.....
                     *   add the part to factory cycle
                     *   you need to wakeup worker to start working if possible
                     */
                } else if ((s2 == 2) && (0 == strcmp(cmd, "end"))) {
                    /* tell the worker to finish
                     * the worker has to finish work first
                     * you should not wait here for the worker to finish */
                    /* if the worker is waiting for work
                       you need to wakeup the worker */
                } else if ((s2 == 2) && (0 == strcmp(cmd, "add"))) {
                    /* add new place */
                    /* if worker and part is ready, start working - wakeup worker */
                } else if ((s2 == 2) && (0 == strcmp(cmd, "remove"))) {
                    /* if you cannot remove empty place you cannot wait for finish work */
                }
            }
            if (s2 > 0) {
                free(cmd);
            }
            if (s2 > 1) {
                free(arg1);
            }
            free(line);
        } else if (s < 0) {
            break;
        }
    }

    /* check if every worker finished work and nobody can continue */
}