06a.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 int main()
   6 {
   7         char *buf = NULL;
   8         size_t len = 0;
   9         long fish[9] = {0};
  10
  11         getline(&buf, &len, stdin);
  12         char *p = strtok(buf, ",");
  13         fish[atoi(p)]++;
  14         while ((p = strtok(NULL, ",")) != NULL)
  15                 fish[atoi(p)]++;
  16
  17         for (long day = 0; day<80; day++)
  18                 fish[(day+7) % 9] += fish[day%9];
  19
  20         for (long i = 1; i<=8; i++)
  21                 fish[0] += fish[i];
  22         printf("%ld\n", fish[0]);
  23 }