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  1. import java.io.BufferedReader;
  2. import java.io.BufferedWriter;
  3. import java.io.IOException;
  4. import java.io.InputStreamReader;
  5. import java.io.OutputStreamWriter;
  6.  
  7.  
  8. class Main
  9. {
  10. 	static void STAR(char[][] S, int I, int J, int K, int N)
  11. 	{
  12. 		if (N == 1) return;
  13.  
  14. 		S[I][J] = '*';
  15. 		S[I][K] = '*';
  16.  
  17. 		STAR(S, I + 1, J - 1, K + 1, N - 1);
  18. 	}
  19.  
  20. 	public static void main(String[] args) throws NumberFormatException, IOException 
  21. 	{
  22. 		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
  23. 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  24.  
  25. 		int N = Integer.parseInt(br.readLine());
  26.  
  27. 		if (N == 1) { bw.write("*"); bw.flush(); return; }
  28.  
  29. 		char[][] S = new char[N + 1][N * 2];
  30.  
  31. 		S[1][N] = '*';
  32.  
  33. 		STAR(S, 2, N - 1, N + 1, N);
  34.  
  35. 		for (int i = 1; i <= N; i++)
  36. 		{
  37. 			int cnt = 2;
  38. 			for (int j = 1; j < N * 2; j++)
  39. 			{
  40. 				bw.write(S[i][j]);
  41. 				if (S[i][j] == '*') cnt--;
  42. 				if (i == 1 && cnt == 1) break;
  43. 				if (i != 1 && cnt == 0) break;
  44. 			}
  45. 			if (i != N) bw.newLine();
  46. 		}
  47.  
  48. 		bw.flush();
  49. 	}
  50. }
Success #stdin #stdout 0.04s 2184192KB
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*
**
https://ideone.com/heZeHt
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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