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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. 	// public int func(int a[] , int b[]){
  11. 	// 	int n = a.length;
  12. 	// 	int m = b.length;
  13.  
  14. 	// 	int len = -1;
  15. 	// 	int maxi = Integer.MIN_VALUE;
  16. 	// 	for(int i=0;i<n;i++){
  17. 	// 		int z1 = 0;
  18. 	// 	    int z2 = 0;
  19. 	// 		for(int j=i;j<n;j++){
  20. 	// 			z1 = z1 ^ a[j];
  21. 	// 			z2 = z2 ^ b[j];
  22. 	// 			if(z1 == z2){
  23. 	// 				len = j-i+1;
  24. 	// 				maxi = Math.max(maxi,len);
  25. 	// 			}
  26. 	// 		}
  27. 	// 	}
  28. 	// 	return maxi;
  29. 	// }
  30. 	public int func(int a[], int b[]){
  31. 		int n = a.length;
  32. 		int c[] = new int[n];
  33. 		for(int i=0;i<n;i++){
  34. 			c[i] = a[i] ^ b[i];
  35. 		}
  36. 		int p[] = new int[n];
  37. 		p[0] = c[0];
  38. 		for(int i=1;i<p.length;i++){
  39. 			p[i] = p[i-1] ^ c[i];
  40. 		}
  41. 		int maxi = 0;
  42. 		int i=-1;
  43. 		HashMap<Integer,Integer>map = new HashMap<>();
  44. 		for(int j=0;j<p.length;j++){
  45. 			int req = p[j] ^ 0;
  46. 			if(map.containsKey(req)){
  47. 				 i = map.getOrDefault(req,0)+1;
  48. 			}
  49. 			int len = j-i+1;
  50. 			maxi = Math.max(maxi,len);
  51. 			if(!map.containsKey(p[j])){
  52. 				map.put(p[j],j);
  53. 			}
  54. 		}
  55. 		return maxi;
  56. 	}
  57. 	public static void main (String[] args) throws java.lang.Exception
  58. 	{
  59. 		// your code goes here
  60. 		Ideone obj = new Ideone();
  61.  
  62.         int a[] = {1, 2, 3, 4};
  63.         int b[] = {1, 3, 2, 4};
  64.  
  65.         int ans = obj.func(a, b);
  66.  
  67.         System.out.println(ans);
  68. 	}
  69. }
Success #stdin #stdout 0.09s 16508KB
comments (?)
stdin 
Standard input is empty
stdout 
3
https://ideone.com/1Q4iqY
language:
Java (HotSpot 12)
created:
51 minutes ago
visibility:
public

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