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  1. #include <iostream>
  2.  
  3. using namespace std;
  4. int arr[21][21][21];
  5.  
  6. int w(int a, int b, int c)
  7. {
  8. 	if (a <= 0 || b <= 0 || c <= 0)
  9. 		return 1;
  10.  
  11. 	else if (a > 20 || b > 20 || c > 20)
  12. 		return w(20, 20, 20);
  13.  
  14. 	else if (arr[a][b][c] != 0) return arr[a][b][c];		//이미 저장된 값이라면
  15.  
  16. 	else if (a < b && b < c)
  17. 		arr[a][b][c] = w(a, b, c - 1) + w(a, b - 1, c - 1) - w(a, b - 1, c);	// 저장이 안된 값
  18.  
  19. 	else
  20. 		arr[a][b][c] = w(a - 1, b, c) + w(a - 1, b - 1, c) + w(a - 1, b, c - 1) - w(a - 1, b - 1, c - 1); // 저장이 안된 값
  21.  
  22. 	return arr[a][b][c];
  23. }
  24.  
  25. int main(void)
  26. {
  27. 	int a, b, c;
  28. 	while (1)
  29. 	{
  30. 		cin >> a >> b >> c;
  31. 		if (a == -1 && b == -1 && c == -1) break;
  32. 		cout << "w(" << a << ", " << b << ", " << c << ") = " << w(a, b, c) << endl;
  33. 	}
  34. 	return 0;
  35. }
Success #stdin #stdout 0s 4696KB
comments (?)
stdin
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1 1 1
2 2 2
10 4 6
50 50 50
-1 7 18
-1 -1 -1
stdout
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w(1, 1, 1) = 2
w(2, 2, 2) = 4
w(10, 4, 6) = 523
w(50, 50, 50) = 1048576
w(-1, 7, 18) = 1
https://ideone.com/0DM4kd
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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