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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. 		Scanner sc=new Scanner(System.in);
  14. 		int n=sc.nextInt();
  15. 		List<Integer> a=new ArrayList<>();
  16. 		List<Integer> b=new ArrayList<>();
  17. 		for(int i=0;i<n;i++)
  18. 		{
  19. 			int ele=sc.nextInt();
  20. 			a.add(ele);
  21. 		}
  22.  
  23. 		for(int i=0;i<n;i++)
  24. 		{
  25. 			int ele=sc.nextInt();
  26. 			b.add(ele);
  27. 		}
  28.  
  29. 		Collections.sort(a);
  30. 		Collections.sort(b);
  31.  
  32. 		long val=0;
  33.  
  34. 		// List<Long> ans=new ArrayList<>();
  35. 		for(int i=0;i<n;i++)
  36. 		{
  37. 			val+= a.get(i)*b.get(i);
  38. 		}
  39. 		System.out.println(val);
  40. 	}
  41. }
Success #stdin #stdout 0.18s 56656KB
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https://ideone.com/6M7kBq
language:
Java (HotSpot 12)
created:
17 days ago
visibility:
public

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