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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 = {1,2,3,4,5,6};
  14. 		int sum = 12;
  15. 		int[] res = twoElementsSum(arr,sum);
  16. 		System.out.println("Indices of two elements with sum "+sum+" is "+ res[0]+" and "+res[1]);
  17. 	}
  18. 	static int[] twoElementsSum(int[] arr, int sum){
  19.  
  20. 		HashMap<Integer,Integer> map = new HashMap<>();
  21. 		int[] res = new int[2];
  22. 		for(int i=0;i<arr.length;i++){
  23. 			if(map.containsKey(sum - arr[i])){
  24. 				res[0] = map.get(sum-arr[i]);
  25. 				res[1] = i;
  26. 				return res;
  27. 			}
  28. 			map.put(arr[i],i);
  29. 		}
  30. 		return new int[]{-1,-1};
  31.  
  32. 	}
  33. }
Success #stdin #stdout 0.18s 57832KB
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Standard input is empty
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Indices of two elements with sum 12 is -1 and -1
https://ideone.com/nkrazt
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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