06a.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 int main()
   6 {
   7         char buf[1000];
   8         if (fgets(buf, 1000, stdin) == NULL)
   9                 return 1;
  10         long fish[9] = {0};
  11         char *p = strtok(buf, ",");
  12         fish[atoi(p)]++;
  13         while ((p = strtok(NULL, ",")) != NULL)
  14                 fish[atoi(p)]++;
  15
  16         for (long day = 0; day<80; day++)
  17                 fish[(day+7) % 9] += fish[day%9];
  18
  19         long sum = 0;
  20         for (long i = 0; i<=8; i++)
  21                 sum += fish[i];
  22         printf("%lu\n", sum);
  23 }