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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4.  
  5. /* Name of the class has to be "Main" only if the class is public. */
  6. class Ideone
  7. {
  8. 	public static void main (String[] args) throws java.lang.Exception
  9. 	{
  10. 		 int[]arr={3,1,4,1,5};
  11. 		 Stack<Integer>st=new Stack<>();
  12. 		 //3,1
  13. 		 ArrayList<Integer>arraylist=new ArrayList<>();
  14. 		 for(int i=0;i<arr.length;i++){
  15. 		 	if(st.isEmpty()){
  16.  
  17. 		 		arraylist.add(-1);
  18. 		 			st.push(i);
  19. 		 		continue;
  20. 		 	}if(arr[st.peek()]>arr[i]){
  21. 		 		arraylist.add(st.peek());     
  22. 		 		continue;
  23. 		 	}
  24. 		 	if(arr[st.peek()]<=arr[i]){
  25. 		 		st.pop();
  26. 		 		st.push(i); 
  27. 		 		arraylist.add(-1);
  28.  
  29. 		 	}
  30. 		 }
  31. 		 int ans=0;
  32. 		 for(int i=0;i<arraylist.size();i++){
  33. 		 	ans=Math.max(i-arraylist.get(i)-1,ans);
  34. 		 }
  35. 		 System.out.println(arraylist);
  36. 	}
  37. }
Success #stdin #stdout 0.11s 54528KB
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Standard input is empty
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[-1, 0, -1, 2, -1]
https://ideone.com/YDIziO
language:
Java (HotSpot 12)
created:
3 days ago
visibility:
public

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