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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. 		// your code goes here
  13. 		int[] arr = {4,5,5,2,4};
  14. 		int n = arr.length;
  15. 		System.out.println("No.of steps to make elements equal "+noOfStepsToMakeAllEqual(arr,n));
  16. 	}
  17. 	static int noOfStepsToMakeAllEqual(int [] arr, int n){
  18. 		TreeMap<Integer,Integer> map = new TreeMap<>(Collections.reverseOrder());
  19. 		for(int i=0;i<n;i++){
  20. 			map.put(arr[i],map.getOrDefault(arr[i],0)+1);
  21. 		}
  22. 		List<Map.Entry<Integer,Integer>> list = new ArrayList<>(map.entrySet());
  23. 		int size = list.size();
  24. 		int step = 0;
  25. 		for(int i =0;i<size-1;i++){
  26.  
  27. 			list.get(i+1).setValue(list.get(i).getValue()+list.get(i+1).getValue());
  28.  
  29. 			step+= list.get(i).getValue();
  30.  
  31. 			list.get(i).setValue(0);
  32.  
  33. 		}
  34. 		return step;
  35. 	}
  36. }
Success #stdin #stdout 0.15s 53664KB
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Standard input is empty
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No.of steps to make elements equal 6
https://ideone.com/DmV0Jc
language:
Java (HotSpot 12)
created:
2 days ago
visibility:
public

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