fork download
copy 
  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. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13. 		// your code goes here
  14. 		Scanner sc = new Scanner(System.in);
  15. 		int r = sc.nextInt();
  16. 		int c = sc.nextInt();
  17.  
  18. 		List<ArrayList<Integer>> Arr = new ArrayList();
  19. 		for(int i=0;i<r;i++){
  20. 			ArrayList<Integer> ar = new ArrayList();
  21. 			for(int j=0;j<c;j++){
  22. 				ar.add(sc.nextInt());
  23. 			}
  24. 			Arr.add(ar);
  25. 		}
  26. 		spiralPrint(Arr);
  27.  
  28. 	}
  29.  
  30.  
  31. 	public static void spiralPrint(List<ArrayList<Integer>>Arr){
  32. 		ArrayList<Integer> result = new ArrayList();
  33. 		int i = 0, j=0;
  34. 		int r = Arr.size()-1;
  35. 		int c = Arr.get(0).size()-1;
  36. 		while(true){
  37. 			if(i == r && j==c){
  38. 				break;
  39. 			}
  40. 			else if(i==r){
  41. 				for(int k = j;k<=c;k++){
  42. 					result.add(Arr.get(i).get(k));
  43. 				}
  44. 				break;
  45. 			}
  46. 			else if(j==c){
  47. 				for(int k = i; k<=r;k++){
  48. 					result.add(Arr.get(k).get(j));
  49. 				}
  50. 				break;
  51. 			}
  52. 			else{
  53. 				for(int k=j;k<=c;k++){
  54. 					System.out.println(Arr.get(i).get(k));
  55. 					result.add(Arr.get(i).get(k));
  56. 				}
  57. 				for(int k=i+1;k<r;k++){
  58. 					System.out.println(Arr.get(k).get(c));
  59. 					result.add(Arr.get(k).get(c));
  60. 				}
  61. 				for(int k=c;k>=j;k--){
  62. 					System.out.println(Arr.get(r).get(k));
  63. 					result.add(Arr.get(r).get(k));
  64. 				}
  65. 				for(int k = r-1; k>i;k--){
  66. 					System.out.println(Arr.get(k).get(j));
  67. 					result.add(Arr.get(k).get(j));
  68. 				}
  69. 				// System.out.println("i - "+ i + " j - "+ j + "r - "+ r + " c - "+c);
  70. 				if(i+1<=r-1 && j+1 <= c-1){
  71. 					i++;
  72. 					j++;
  73. 					r--;
  74. 					c--;					
  75. 				}
  76. 				else{
  77. 					break;
  78. 				}
  79. 			}
  80. 		}
  81.  
  82. 		for(int kk=0;kk<result.size();kk++){
  83. 			System.out.print(result.get(kk)+" ");
  84. 		}
  85.  
  86. 	}
  87. }
Success #stdin #stdout 0.06s 2184192KB
comments (?)
stdin
copy 
3 4 1 2 3 4 5 6 7 8 9 10 11 12
stdout
copy 
1
2
3
4
8
12
11
10
9
5
1 2 3 4 8 12 11 10 9 5 6 7
https://ideone.com/3VNmEW
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!