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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[] arr = {-1,2,-3,3};
  13.     	System.out.println(findMax(arr));
  14.  	}
  15.  
  16. 	 static int findMax(int[] nums) {
  17.  
  18.      int max = Integer.MIN_VALUE; 
  19.  
  20.  
  21.      int n = nums.length;
  22.      HashSet<Integer> set  = new HashSet<>();
  23.  
  24.      for(int i=0;i<n;i++){
  25.       set.add(nums[i]);
  26.      }
  27.  
  28.      for(int i=0;i<n;i++){
  29.         if(set.contains(-nums[i])){
  30.             max = Math.max(max,Math.abs(nums[i]));
  31.         }
  32.      }
  33.      if(max == Integer.MIN_VALUE){
  34.          return -1;
  35.      }
  36.  
  37.      return max;
  38.  
  39.     }
  40. }
Success #stdin #stdout 0.08s 54624KB
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Standard input is empty
stdout 
3
https://ideone.com/F2Quwt
language:
Java (HotSpot 12)
created:
10 days ago
visibility:
public

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