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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 static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		//int[] A={86,34, 8, 10, 3, 2, 80, 30, 33, 1};
  13. 		//int[] A={9, 2, 3, 4, 5, 6, 7, 8, 18, 0};
  14. 		//int[] A={1, 2, 3, 4, 5, 6};
  15. 		//int[] A={6, 5, 4, 3, 2, 1};
  16. 		//int[] A={1, 5, 4, 6, 10, 7, 8};
  17. 		//int[] A={9, 2, 3, 4, 5, 6, 7, 18, 1, 0};
  18. 		int[] A={99, 100 , 1, 2, 3, 4, 5, 6, 7};
  19. 		System.out.print("Result max index is "+getMaxIndexDiff(A));
  20. 	}
  21. 	public static int getMaxIndexDiff(int[] A){
  22. 		int max=0;
  23. 		int i,j;
  24. 		int[] stack=new int[A.length];
  25. 		int top=-1;
  26. 		j=A.length-1;
  27. 		for(i=A.length-2;i>=0;i--){
  28. 			if(A[i]>A[j]){
  29. 			stack[++top]=j;
  30. 			j=i;
  31. 			}
  32. 		}
  33. 		i++;
  34. 		if(j-i>max)
  35. 		max=j-i;
  36.  
  37. 		i=0;
  38. 		while(top>=0 && i<A.length){
  39. 			if(A[i]<A[stack[top]]){
  40. 				j=stack[top--];
  41. 				if(j-i>max)
  42. 				max=j-i;
  43. 			}
  44. 			else
  45. 			i++;
  46. 		}
  47.  
  48. 		return max;
  49. 	}
  50. }
Success #stdin #stdout 0.06s 380160KB
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stdin
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Standard input is empty
stdout
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Result max index is 6
https://ideone.com/bA5w2v
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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