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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <stdbool.h>
  4.  
  5.  
  6. int
  7. max (int a, int b)
  8. {
  9.     return a > b ? a : b;
  10. }
  11.  
  12. int
  13. min (int a, int b)
  14. {
  15.     return a < b ? a : b;
  16. }
  17.  
  18. int
  19. protect_value (int value)
  20. {
  21.     return max(0, min(7, value));
  22. }
  23.  
  24. bool
  25. is_terminal (char c)
  26. {
  27. 	return (c == ' ') || (c == '\n') || (c == EOF) || (c == '\t');
  28. }
  29.  
  30. int
  31. main (void)
  32. {
  33.     bool is_free[8][8];
  34.     signed short next_letter;
  35.     for(int i = 0; i < 8; i++)
  36.     {
  37.     	for(int j = 0; j < 8; j++)
  38.     	{
  39.     		is_free[i][j] = 1;
  40.     	}
  41.     }
  42.     while (!is_terminal(next_letter = getchar()))
  43.     {
  44.         signed short next_digit = getchar();
  45.         int x = next_letter - 'a', y = next_digit - '1';
  46.         for (int i = -1; i <= 1; i++)
  47.         {
  48.             for (int j = -1; j <= 1; j++)
  49.             {
  50.             	is_free[protect_value(x + i)][protect_value(y + j)] = 0;
  51.             }
  52.         }
  53.     }
  54.     int answer = 0;
  55.     for (int i = 0; i < 8; i++)
  56.     {
  57.         for (int j = 0; j < 8; j++)
  58.         {
  59.             answer += is_free[i][j] ? 1 : 0;
  60.         }
  61.     }
  62.     printf("%d", answer);
  63.     return 0;
  64. }
  65.  
Success #stdin #stdout 0s 4468KB
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https://ideone.com/NkXfE3
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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