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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.  
  11. 	static int[] pai = new int[9];
  12. 	static int count = 0;
  13. 	static HashSet<String> set = new HashSet<>();
  14.  
  15. 	public static void main (String[] args) throws java.lang.Exception
  16. 	{
  17. 		// your code goes here
  18. 		Arrays.fill(pai, 4);
  19. 		atama();
  20.  
  21. 		System.out.println(count);
  22. 		System.out.println(set.size());
  23. 	}
  24.  
  25. 	static void atama() {
  26. 		for (int i = 0; i < 9; i++) {
  27. 			pai[i] -= 2;
  28. 			ments(4, 0);
  29. 			pai[i] += 2;
  30. 		}
  31. 	}
  32.  
  33. 	static void ments(int rem, int p) {
  34. 		if (rem == 0) {
  35. 			count++;
  36. 			StringBuilder sb = new StringBuilder();
  37. 			for (int i = 0; i < 9; i++) sb.append(pai[i]);
  38. 			set.add(sb.toString());
  39. 			return;
  40. 		}
  41. 		for (int i = p; i < 9; i++) {
  42. 			if (pai[i] < 4) continue;
  43. 			pai[i] -= 3;
  44. 			ments(rem - 1, i);
  45. 			pai[i] += 3;
  46. 		}
  47. 		for (int i = p; i < 7; i++) {
  48. 			if (pai[i] == 0) continue;
  49. 			if (pai[i+1] == 0) continue;
  50. 			if (pai[i+2] == 0) continue;
  51. 			pai[i]--;
  52. 			pai[i+1]--;
  53. 			pai[i+2]--;
  54. 			ments(rem - 1, i);
  55. 			pai[i]++;
  56. 			pai[i+1]++;
  57. 			pai[i+2]++;
  58. 		}
  59. 	}
  60. }
Success #stdin #stdout 0.23s 62392KB
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https://ideone.com/x41xwi
麻雀
数牌(筒子)のみ
和了形の総数計算
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
public

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